Can someone else check this one. The list above stated None for n=50.
But the PARI script (isddp.txt) run against all known Octoproth's gave this:
717083008036395 50 is DodecaProth! ... Left_legs=1, Rigth_legs=0.
Either there is a problem with dodeca_2_0.c or that PARI script:
$ ../dodeca20 50 7170000000000000 7200000000000000
You can also find the k n values in results_dodeca.txt file ( These are 3probable primes )
n=50, kmin=7170000000000000, kmax=7200000000000000, version=2.0
Starting the sieve...
Using the first 9 primes to reduce the size of the sieve array
The sieving is complete.
Number of Prp tests=1567
Time=22 sec.
