
Curios:
Curios Search:
Participate: 
(85^{11}  85)/11 ± 1 are twin primes. [Luhn] Between 641 and 114689 (the second smallest Fermat divisor) there exist 85 prime numbers that could conceivably be Fermat divisors. There are 85 fivedigit primes that begin with 85. [Bopardikar] The only composite number resulting from the sum of three doubledigit consecutive emirps, 17, 31, 37. Note that the concatenation in order of these emirps, i.e., 173137 is prime. [Loungrides] The only known Smith number n such that the aliquot sum of n = (n). [Gupta]
(There is one curio for this number that has not yet been approved by an editor.)
Prime Curios! © 20002018 (all rights
reserved)
