10801...10801 (181-digits)
This number is a prime.
1 0801080108 0108010801 0801080108 0108010801
0801080108 0108010801 0801080108 0108010801 0801080108 0108010801 0801080108
0108010801 0801080108 0108010801 0801080108 0108010801 0801080108 0108010801
A tetradic prime of the form 10801080...08010801. Note that the number of digits is also a tetradic prime. [Marcel]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean