Английская Википедия:70,000

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Шаблон:Infobox number

70,000 (seventy thousand) is the natural number that comes after 69,999 and before 70,001. It is a round number.

Selected numbers in the range 70001–79999

70001 to 70999

  • 70030 = largest number of digits of π that have been recited from memory

71000 to 71999

  • 71656 = pentagonal pyramidal number

72000 to 72999

73000 to 73999

74000 to 74999

  • 74088 = 423 = 23 * 33 * 73
  • 74353 = Friedman prime
  • 74897 = Friedman prime

75000 to 75999

  • 75025 = Fibonacci number,[1] Markov number[2]
  • 75361 = Carmichael number[3]

76000 to 76999

  • 76084 = amicable number with 63020
  • 76424 = tetranacci number[4]

77000 to 77999

  • 77777 = repdigit
  • 77778 = Kaprekar number[5]

78000 to 78999

  • 78125 = 57
  • 78163 = Friedman prime
  • 78498 = the number of primes under 1,000,000
  • 78557 = conjectured to be the smallest Sierpiński number
  • 78732 = 3-smooth number

79000 to 79999

  • 79507 = 433

Primes

There are 902 prime numbers between 70000 and 80000.

References

Шаблон:Reflist

Шаблон:Integers