
Curios:
Curios Search:
Participate: 
128 = 2! + 3! + 5!. [Petersen] 128 + (1 + 2 + 8) is prime. Note that 1 * 2 * 8 divides 128. [Capelle] The largest known even number that can be expressed as the sum of two primes in exactly three ways. [Capelle]
(There are 3 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002017 (all rights
reserved)
