The book is now available! 2
(just those submitted by Firoozbakht)
Prime Curios!

Valid HTML 4.01!

Curios: Curios Search:

GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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

+ The only prime p such that p times reversal(p) - 1 is prime. [Firoozbakht]

+ The only known number n such that the sum of the proper divisors of n is equal to phi(n). [Firoozbakht]

+ Only prime whose sum of divisors is prime. [Firoozbakht]

Prime Curios! © 2000-2019 (all rights reserved)  privacy statement   (This page was generated in 0.0185 seconds.)