Search results
Results from the WOW.Com Content Network
The following table lists the first 1000 primes, with 20 columns of consecutive primes in each of the 50 rows. ... Odd primes p that divide the class number of the p ...
An odd number does not have the ... A factorial x! is the product of all numbers from 1 to x. The first: 1, 2, 6, 24 ... The first in decimal: 4, 6, 8, 9, 12, 18, 20 ...
[7] [8] [9] It is widely believed, [10] but not proven, that no odd perfect numbers exist; numerous restrictive conditions have been proven, [10] including a lower bound of 10 1500. [11] The following is a list of all 52 currently known (as of January 2025) Mersenne primes and corresponding perfect numbers, along with their exponents p.
Therefore, every prime number other than 2 is an odd number, and is called an odd prime. [10] Similarly, when written in the usual decimal system, all prime numbers larger than 5 end in 1, 3, 7, or 9. The numbers that end with other digits are all composite: decimal numbers that end in 0, 2, 4, 6, or 8 are even, and decimal numbers that end in ...
A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.
The first four perfect numbers are 6, 28, ... [20] Any odd perfect number N must satisfy the following conditions: N > 10 1500. [21] N is not divisible by 105. [22]
The first few weird numbers are 70, 836, 4030, 5830, 7192, ... It is not known if any odd weird numbers exist. ... 20 languages ...
In number theory, a Descartes number is an odd number which would have been an odd perfect number if one of its composite factors were prime.They are named after René Descartes who observed that the number D = 3 2 ⋅7 2 ⋅11 2 ⋅13 2 ⋅22021 = (3⋅1001) 2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if only 22021 were a prime number, since the sum-of-divisors ...