This number is a prime.

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

+ In chess, the "rule of 5" is for positions in which the pawn is protected and the opposing king is cut off by files: Add the number of rank of the pawn to the number of files the defender's king is cut off. If the sum is more than five, it is usually a win. Otherwise it is normally a draw. [Soltis and Mednis]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell