custom code : trial division to 10^8
GMP 4.2-ECM 6.1 : PRP
PrimeForm v. 0.4 Upd.4 : PRP bases 17 , 37 , 47 , 67
custom code : strongly-probable prime to prime bases
61433509 , 61439617 , 61444441 , 61479461
and 3 others
Define np ( n1 ) = n1^n1 + (n1+1)^(n1+1) .
Let a = 3758 .
Let p = np ( a ) / ( 9067 * 3706499 * 250191823789 ) .
p is an 13417-digit strongly-probable prime .
p*(p-1) + a has 26834 digits .
np ( p*(p-1) + a ) has more .
p divides np ( p*(p-1) + a ) .

To be completed...