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Search: Posts Made By: Dylan14
Forum: Wagstaff PRP Search 2019-11-17, 21:12
Replies: 28
Views: 8,619
Posted By Dylan14
Thanks axn for the advice. I've updated the ABC2...

Thanks axn for the advice. I've updated the ABC2 header:


ABC2 2*(4*$a)*((2^42737+1)/3)+1 | 2*(4*$a+3)*((2^42737+1)/3)+1
a: from 0 to 62500
The first expression tests k's which are 0 mod 4, and...
Forum: Wagstaff PRP Search 2019-11-15, 04:55
Replies: 28
Views: 8,619
Posted By Dylan14
I don't know if there has been any update to...

I don't know if there has been any update to searching for factors of double Wagstaffs, but I searched for potential factors of W(W(42737)), using pfgw64 with the -f1 flag, and the following input:
...
Forum: Wagstaff PRP Search 2019-06-27, 04:13
Replies: 28
Views: 8,619
Posted By Dylan14
Looking at the source code for mmff, it appears...

Looking at the source code for mmff, it appears the limits are
Exponents 31, 61, 89, 107, 127 for double Mersennes and
Exponents <= 223 for Fermat numbers.
Largest bit level it can test depends...
Forum: Wagstaff PRP Search 2019-06-26, 17:07
Replies: 28
Views: 8,619
Posted By Dylan14
Instead of trying to modify mmff to handle double...

Instead of trying to modify mmff to handle double Wagstaff numbers, it might be easier to modify dmdsieve from the mtsieve suite. In this case the appropriate header to pass to pfgw would be

ABCD...
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