80,000

From HandWiki
Short description: Natural number
← 79999 80000 80001 →
Cardinaleighty thousand
Ordinal80000th
(eighty thousandth)
Factorization27 × 54
Greek numeral[math]\displaystyle{ \stackrel{\eta}{\Mu} }[/math]
Roman numeralLXXX
Binary100111000100000002
Ternary110012012223
Quaternary1032020004
Quinary100300005
Senary14142126
Octal2342008
Duodecimal3A36812
Hexadecimal1388016
VigesimalA00020
Base 361PQ836

80,000 (eighty thousand) is the natural number after 79,999 and before 80,001.

Selected numbers in the range 80,000–89,999

  • 80,782 = Pell number P14[1]
  • 81,181 = number of reduced trees with 25 nodes[2]
  • 82,000 = the only currently known number greater than 1 that can be written in bases from 2 through 5 using only 0s and 1s.[3][4]
  • 82,025 = number of primes [math]\displaystyle{ \leq 2^{20} }[/math].[5]
  • 82,467 = number of square (0,1)-matrices without zero rows and with exactly 6 entries equal to 1[6]
  • 82,656 = Kaprekar number: 826562 = 6832014336; 68320 + 14336 = 82656[7]
  • 82,944 = 3-smooth number: 210 × 34
  • 83,097 = Riordan number
  • 83,160 = highly composite number[8]
  • 83,357 = Friedman prime[9]
  • 83,521 = 174
  • 84,187 – number of parallelogram polyominoes with 15 cells.[10]
  • 84,375 = 33×55[11]
  • 84,672 = number of primitive polynomials of degree 21 over GF(2)[12]
  • 85,085 = product of five consecutive primes: 5 × 7 × 11 × 13 × 17
  • 85,184 = 443
  • 86,400 = seconds in a day: 24 × 60 × 60 and common DNS default time to live
  • 87,360 = unitary perfect number[13]
  • 88,789 = the start of a prime 9-tuple, along with 88793, 88799, 88801, 88807, 88811, 88813, 88817, and 88819.
  • 88,888 = repdigit

Primes

There are 876 prime numbers between 80000 and 90000.

80021, 80039, 80051, 80071, 80077, 80107, 80111, 80141, 80147, 80149, 80153, 80167, 80173, 80177, 80191, 80207, 80209, 80221, 80231, 80233, 80239, 80251, 80263, 80273, 80279, 80287, 80309, 80317, 80329, 80341, 80347, 80363, 80369, 80387, 80407, 80429, 80447, 80449, 80471, 80473, 80489, 80491, 80513, 80527, 80537, 80557, 80567, 80599, 80603, 80611, 80621, 80627, 80629, 80651, 80657, 80669, 80671, 80677, 80681, 80683, 80687, 80701, 80713, 80737, 80747, 80749, 80761, 80777, 80779, 80783, 80789, 80803, 80809, 80819, 80831, 80833, 80849, 80863, 80897, 80909, 80911, 80917, 80923, 80929, 80933, 80953, 80963, 80989, 81001, 81013, 81017, 81019, 81023, 81031, 81041, 81043, 81047, 81049, 81071, 81077, 81083, 81097, 81101, 81119, 81131, 81157, 81163, 81173, 81181, 81197, 81199, 81203, 81223, 81233, 81239, 81281, 81283, 81293, 81299, 81307, 81331, 81343, 81349, 81353, 81359, 81371, 81373, 81401, 81409, 81421, 81439, 81457, 81463, 81509, 81517, 81527, 81533, 81547, 81551, 81553, 81559, 81563, 81569, 81611, 81619, 81629, 81637, 81647, 81649, 81667, 81671, 81677, 81689, 81701, 81703, 81707, 81727, 81737, 81749, 81761, 81769, 81773, 81799, 81817, 81839, 81847, 81853, 81869, 81883, 81899, 81901, 81919, 81929, 81931, 81937, 81943, 81953, 81967, 81971, 81973, 82003, 82007, 82009, 82013, 82021, 82031, 82037, 82039, 82051, 82067, 82073, 82129, 82139, 82141, 82153, 82163, 82171, 82183, 82189, 82193, 82207, 82217, 82219, 82223, 82231, 82237, 82241, 82261, 82267, 82279, 82301, 82307, 82339, 82349, 82351, 82361, 82373, 82387, 82393, 82421, 82457, 82463, 82469, 82471, 82483, 82487, 82493, 82499, 82507, 82529, 82531, 82549, 82559, 82561, 82567, 82571, 82591, 82601, 82609, 82613, 82619, 82633, 82651, 82657, 82699, 82721, 82723, 82727, 82729, 82757, 82759, 82763, 82781, 82787, 82793, 82799, 82811, 82813, 82837, 82847, 82883, 82889, 82891, 82903, 82913, 82939, 82963, 82981, 82997, 83003, 83009, 83023, 83047, 83059, 83063, 83071, 83077, 83089, 83093, 83101, 83117, 83137, 83177, 83203, 83207, 83219, 83221, 83227, 83231, 83233, 83243, 83257, 83267, 83269, 83273, 83299, 83311, 83339, 83341, 83357, 83383, 83389, 83399, 83401, 83407, 83417, 83423, 83431, 83437, 83443, 83449, 83459, 83471, 83477, 83497, 83537, 83557, 83561, 83563, 83579, 83591, 83597, 83609, 83617, 83621, 83639, 83641, 83653, 83663, 83689, 83701, 83717, 83719, 83737, 83761, 83773, 83777, 83791, 83813, 83833, 83843, 83857, 83869, 83873, 83891, 83903, 83911, 83921, 83933, 83939, 83969, 83983, 83987, 84011, 84017, 84047, 84053, 84059, 84061, 84067, 84089, 84121, 84127, 84131, 84137, 84143, 84163, 84179, 84181, 84191, 84199, 84211, 84221, 84223, 84229, 84239, 84247, 84263, 84299, 84307, 84313, 84317, 84319, 84347, 84349, 84377, 84389, 84391, 84401, 84407, 84421, 84431, 84437, 84443, 84449, 84457, 84463, 84467, 84481, 84499, 84503, 84509, 84521, 84523, 84533, 84551, 84559, 84589, 84629, 84631, 84649, 84653, 84659, 84673, 84691, 84697, 84701, 84713, 84719, 84731, 84737, 84751, 84761, 84787, 84793, 84809, 84811, 84827, 84857, 84859, 84869, 84871, 84913, 84919, 84947, 84961, 84967, 84977, 84979, 84991, 85009, 85021, 85027, 85037, 85049, 85061, 85081, 85087, 85091, 85093, 85103, 85109, 85121, 85133, 85147, 85159, 85193, 85199, 85201, 85213, 85223, 85229, 85237, 85243, 85247, 85259, 85297, 85303, 85313, 85331, 85333, 85361, 85363, 85369, 85381, 85411, 85427, 85429, 85439, 85447, 85451, 85453, 85469, 85487, 85513, 85517, 85523, 85531, 85549, 85571, 85577, 85597, 85601, 85607, 85619, 85621, 85627, 85639, 85643, 85661, 85667, 85669, 85691, 85703, 85711, 85717, 85733, 85751, 85781, 85793, 85817, 85819, 85829, 85831, 85837, 85843, 85847, 85853, 85889, 85903, 85909, 85931, 85933, 85991, 85999, 86011, 86017, 86027, 86029, 86069, 86077, 86083, 86111, 86113, 86117, 86131, 86137, 86143, 86161, 86171, 86179, 86183, 86197, 86201, 86209, 86239, 86243, 86249, 86257, 86263, 86269, 86287, 86291, 86293, 86297, 86311, 86323, 86341, 86351, 86353, 86357, 86369, 86371, 86381, 86389, 86399, 86413, 86423, 86441, 86453, 86461, 86467, 86477, 86491, 86501, 86509, 86531, 86533, 86539, 86561, 86573, 86579, 86587, 86599, 86627, 86629, 86677, 86689, 86693, 86711, 86719, 86729, 86743, 86753, 86767, 86771, 86783, 86813, 86837, 86843, 86851, 86857, 86861, 86869, 86923, 86927, 86929, 86939, 86951, 86959, 86969, 86981, 86993, 87011, 87013, 87037, 87041, 87049, 87071, 87083, 87103, 87107, 87119, 87121, 87133, 87149, 87151, 87179, 87181, 87187, 87211, 87221, 87223, 87251, 87253, 87257, 87277, 87281, 87293, 87299, 87313, 87317, 87323, 87337, 87359, 87383, 87403, 87407, 87421, 87427, 87433, 87443, 87473, 87481, 87491, 87509, 87511, 87517, 87523, 87539, 87541, 87547, 87553, 87557, 87559, 87583, 87587, 87589, 87613, 87623, 87629, 87631, 87641, 87643, 87649, 87671, 87679, 87683, 87691, 87697, 87701, 87719, 87721, 87739, 87743, 87751, 87767, 87793, 87797, 87803, 87811, 87833, 87853, 87869, 87877, 87881, 87887, 87911, 87917, 87931, 87943, 87959, 87961, 87973, 87977, 87991, 88001, 88003, 88007, 88019, 88037, 88069, 88079, 88093, 88117, 88129, 88169, 88177, 88211, 88223, 88237, 88241, 88259, 88261, 88289, 88301, 88321, 88327, 88337, 88339, 88379, 88397, 88411, 88423, 88427, 88463, 88469, 88471, 88493, 88499, 88513, 88523, 88547, 88589, 88591, 88607, 88609, 88643, 88651, 88657, 88661, 88663, 88667, 88681, 88721, 88729, 88741, 88747, 88771, 88789, 88793, 88799, 88801, 88807, 88811, 88813, 88817, 88819, 88843, 88853, 88861, 88867, 88873, 88883, 88897, 88903, 88919, 88937, 88951, 88969, 88993, 88997, 89003, 89009, 89017, 89021, 89041, 89051, 89057, 89069, 89071, 89083, 89087, 89101, 89107, 89113, 89119, 89123, 89137, 89153, 89189, 89203, 89209, 89213, 89227, 89231, 89237, 89261, 89269, 89273, 89293, 89303, 89317, 89329, 89363, 89371, 89381, 89387, 89393, 89399, 89413, 89417, 89431, 89443, 89449, 89459, 89477, 89491, 89501, 89513, 89519, 89521, 89527, 89533, 89561, 89563, 89567, 89591, 89597, 89599, 89603, 89611, 89627, 89633, 89653, 89657, 89659, 89669, 89671, 89681, 89689, 89753, 89759, 89767, 89779, 89783, 89797, 89809, 89819, 89821, 89833, 89839, 89849, 89867, 89891, 89897, 89899, 89909, 89917, 89923, 89939, 89959, 89963, 89977, 89983, 89989

See also

  • 80,000 Hours, a British career advisory service

References

  1. ↑ Sloane, N. J. A., ed. "Sequence A000129 (Pell numbers)". OEIS Foundation. https://oeis.org/A000129. Retrieved 2016-06-16. 
  2. ↑ Sloane, N. J. A., ed. "Sequence A000014 (Number of series-reduced trees with n nodes)". OEIS Foundation. https://oeis.org/A000014. 
  3. ↑ Sequence A146025 in The On-Line Encyclopedia of Integer Sequences
  4. ↑ Sequence A258107 in The On-Line Encyclopedia of Integer Sequences
  5. ↑ Sloane, N. J. A., ed. "Sequence A007053". OEIS Foundation. https://oeis.org/A007053. Retrieved 2022-06-02. 
  6. ↑ Sloane, N. J. A., ed. "Sequence A122400 (Number of square (0,1)-matrices without zero rows and with exactly n entries equal to 1)". OEIS Foundation. https://oeis.org/A122400. 
  7. ↑ Sloane, N. J. A., ed. "Sequence A006886 (Kaprekar numbers)". OEIS Foundation. https://oeis.org/A006886. Retrieved 2016-06-16. 
  8. ↑ Sloane, N. J. A., ed. "Sequence A002182 (Highly composite numbers)". OEIS Foundation. https://oeis.org/A002182. Retrieved 2016-06-16. 
  9. ↑ (sequence A112419 in the OEIS)
  10. ↑ Sloane, N. J. A., ed. "Sequence A006958 (Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused))". OEIS Foundation. https://oeis.org/A006958. 
  11. ↑ Sloane, N. J. A., ed. "Sequence A048102 (Numbers k such that if k equals Product p_i^e_i then p_i equals e_i for all i)". OEIS Foundation. https://oeis.org/A048102. 
  12. ↑ Sloane, N. J. A., ed. "Sequence A011260 (Number of primitive polynomials of degree n over GF(2))". OEIS Foundation. https://oeis.org/A011260. 
  13. ↑ Sloane, N. J. A., ed. "Sequence A002827 (Unitary perfect numbers)". OEIS Foundation. https://oeis.org/A002827. Retrieved 2016-06-16. 



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