
Curios:
Curios Search:
Participate: 
10^{69} + 69 is prime. [Gupta] The sum of the first nonprimes less than or equal to 69 is prime. [Patterson] 100^69  69 is prime. Note that 69 is the smallest number with this property. [Firoozbakht] The smallest strobogrammatic semiprime. [Capelle] Strobogrammatic primes that don't use 6 or 9 are dihedral primes. (6) * prime(9) = 69. [Gupta]
(There are 6 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002018 (all rights
reserved)
privacy statement
