257

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This article is about a particular natural number.|View all articles on particular natural numbers

Summary

Factorization

The number 257 is a prime number.

Properties and families

Property or family Parameter values First few numbers Proof of satisfaction/membership/containment
prime number 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, [SHOW MORE]View list on OEIS divide and check
Fermat number , i.e., 3, 5, 17, 257, 65537, 4294967297 View list on OEIS plug and check
Fermat prime (Fermat number that is also a prime number) , i.e., 3, 5, 17, 257, 65537, 4294967297 View list on OEIS follows from being both a Fermat number and prime number