The book is now available! 20325153628489
(just those submitted by Gallardo)
Prime Curios!
Curios: Curios Search:

                                                             2032 5153628489

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

+ This prime is the sequence of all two digit numbers 'ab' (20, 32, 51, 53, 62, 84 and 89) such that 10*'ab'+'d' is composite for any value of the digit 'd'. [Gallardo]

Prime Curios! © 2000-2017 (all rights reserved)