The book is now available! 909090909090909091
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

                                                         90909090 9090909091
+ (1019 + 1)/11. (Like the number itself, this contains only the digits 0, 1, and 9.) [Pickover]

+ The only known prime that is the quotient of a repunit number divided by the product of two repunit primes, i.e., R38/(R2*R19). [Loungrides]

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement