137

This number is a prime.

Just showing those entries submitted by 'Post': (Click here to show all)

+ The sum of the squares of the first seven digits of π is the smallest such prime: 3^2 + 1^2 + 4^2 + 1^2 + 5^2 + 9^2 + 2^2 = 137. [Post]

+ Mabkhout (1993) showed that every number x^4 + 1, for x > 3, has a prime factor greater than or equal to 137. He used a classical result of Størmer. [Post]

+ The smallest prime with 3 distinct digits that remains prime if any one of its digits is removed. [Post]

(There is one curio for this number that has not yet been approved by an editor.)

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell