30030
This number is a composite.
The primorial 13# is the only known (as of 2018) primorial that produces four primes in a row from the formula pi + Q#/pi, for Q=13 and i=1, 2, 3 and 4: 2*3*5*7*11*13 = 30030 = 13#, 2+3*5*7*11*13=15017 (prime) 2*3+5*7*11*13=5011 (prime), 2*3*5+7*11*13=1031 (prime), 2*3*5*7+11*13=353 (prime). Found by J. M. Bergot. [Rivera]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell