380
This number is a composite.
Just showing those entries submitted by 'Sladcik': (Click here to show all)
380 is the smallest number divisible by 5 of the form
pi ( pi + 1 ) where pi is prime and does not equal 5. [Sladcik]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell