Английская Википедия:30,000
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Шаблон:Infobox number 30,000 (thirty thousand) is the natural number that comes after 29,999 and before 30,001.
Selected numbers in the range 30001–39999
30001 to 30999
- 30029 = primorial prime
- 30030 = primorial[1]
- 30031 = smallest composite number which is one more than a primorial
- 30203 = safe prime
- 30240 = harmonic divisor number[2]
- 30323 = Sophie Germain prime and safe prime
- 30420 = pentagonal pyramidal number[3]
- 30537 = Riordan number
- 30694 = open meandric number
- 30941 = first base 13 repunit prime
31000 to 31999
- 31116 = octahedral number[4]
- 31337 = cousin prime, pronounced elite, an alternate way to spell 1337, an obfuscated alphabet made with numbers and punctuation, known and used in the gamer, hacker, and BBS cultures.
- 31395 = square pyramidal number
- 31397 = prime number followed by a record prime gap of 72, the first greater than 52[5]
- 31688 = the number of years approximately equal to 1 trillion seconds
- 31721 = start of a prime quadruplet[6]
- 31929 = Zeisel number[7]
32000 to 32999
- 32043 = smallest number whose square is pandigital.
- 32045 = can be expressed as a sum of two squares in more ways than any smaller number.[8]
- 32760 = harmonic divisor number[2]
- 32761 = 1812, centered hexagonal number
- 32767 = 215 − 1, largest positive value for a signed (two's complement) 16-bit integer on a computer.
- 32768 = 215 = 85, maximum absolute value of a negative value for a signed (two's complement) 16-bit integer on a computer.
- 32800 = pentagonal pyramidal number[3]
- 32993 = Leyland number[9]
33000 to 33999
- 33333 = repdigit
- 33461 = Pell number,[10] Markov number[11]
- 33511 = square pyramidal number
- 33781 = octahedral number[4]
34000 to 34999
- 34560 = 5 superfactorial[12]
- 34790 = number of non-isomorphic set-systems of weight 13.
- 34841 = start of a prime quadruplet[6]
- 34969 = favorite number of the Muppet character Count von Count[13]
35000 to 35999
- 35720 = square pyramidal number
- 35840 = number of ounces in a long ton (2,240 pounds)
- 35890 = tribonacci number[14]
- 35899 = alternating factorial[15]
- 35937 = 333, chiliagonal number[16]
- 35964 = digit-reassembly number
36000 to 36999
- 36100 = sum of the cubes of the first 19 positive integers
- 36463 – number of parallelogram polyominoes with 14 cells[17]
- 36594 = octahedral number[4]
37000 to 37999
- 37378 = semi-meandric number[18]
- 37634 = third term of the Lucas–Lehmer sequence
- 37666 = Markov number[11]
- 37926 = pentagonal pyramidal number[3]
38000 to 38999
- 38024 = square pyramidal number
- 38209 = n such that n | (3n + 5)[19]
- 38416 = 144
- 38807 = number of non-equivalent ways of expressing 10,000,000 as the sum of two prime numbers[20]
- 38962 = Kaprekar number[21]
39000 to 39999
Primes
There are 958 prime numbers between 30000 and 40000.
References
- ↑ Шаблон:Cite web
- ↑ 2,0 2,1 Шаблон:Cite web
- ↑ 3,0 3,1 3,2 Шаблон:Cite web
- ↑ 4,0 4,1 4,2 4,3 Шаблон:Cite web
- ↑ Шаблон:MathWorld
- ↑ 6,0 6,1 Шаблон:Cite OEIS
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite OEIS
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ 11,0 11,1 Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite OEIS
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite OEIS
- ↑ Шаблон:Cite OEIS
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web