need help with ecm lines

[jasong]

I apologize for this easy question, but when I tried to search for the obvious 'ecm=' as a search term, both Mersenne Forum and Google choked on the '=' even though it was typed as

"ecm="

Could someone give me a linkie, please?

Edit: For version 24.14
Edit 2: It has to do with numbers b^n-1, with b an odd prime and n a prime. The Odd Perfect Number search is what I'm crunching for. If it helps you help me, than the specific numbers at the moment are 2801^79-1 and 2801^83-1.

[jasong]

I found the following in the mprime readme.txt file. What are the 'not used anymore' options?

ECM=751,3000000,0,100,0,0,0,0

The first value is the exponent. The second value is bound #1. The
third value is bound #2 - leave it as zero. The fourth value is the
number of curves to test. The fifth value is no longer used.
The sixth value is the specific curve to test - it is only used in
debugging. The seventh value is 0 for 2^N-1 factoring, 1 for 2^N+1
factoring. The eighth value is no longer used.

[jasong]

Found the answer:

ECM2=k,b,n,c,B1,B2,curves_to_do[,specific_sigma,B2_start]

[Prime95]

For b != 2, GMP-ECM may be faster.