The book is now available! 220
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 
Participate:
+ The largest difference between two consecutive primes less than 108. [Luhn]

+ The difference of two smallest pseudoprimes base 2 is 220, the smallest amicable number. [Gupta]



Prime Curios! © 1999-2010 (all rights reserved)