487

This number is a prime.

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

The smallest prime number that produces three more primes when reiteratively doubled and reversed three consecutive times (479, 859, and 8171). [Gaydos]

There are 487 "one pair" Sophie Germain primes; 5-digit numbers with 4 different digits. [Gaydos]