Low exponents in nofactor.zip

[henryzz]

what effort has been put into factoring these numbers

[S485122]

nofactor.zip -> nofactor.cmp -> nofactor.txt contains the number of bits od trial factoring.

pminus1.zip -> pminus1.txt contains the P-1 factoring bounds of exponents.

I am currently busy (at a very slow pace considering the number of exponents) doing P-1 fatoring on the 2M and 5M ranges for all exponents that have had no (or P-1 to very low limits) P-1 work done. I do not know if this is of any use to anybody, but I do it to occupy one core of a machine with 64 bits OS and 4GB of memory : "my P-1 core".

for instance :
Pminus1=1,2,2827823,-1,100000,3000000
Pminus1=1,2,2827901,-1,100000,3000000
each line takes less than half an hour. The yield should be round 7% of factors found. It is lower at the moment : a bit more than 4% for the 266 exponents tested...

There are some 1600 2M exponents, 6000 5M exponents, 4000 6M exponents, 2000 7M exponents, 1400 8M exponents, 1800 9M exponents and then some hundreds higher exponents to do. Enough for a few years.

This "work" does not earn any credits.

Jacob

[henryzz]

what about ecm status with these exponents

[Prime95]

http://mersenne.org/ecm1.htm and
http://mersenne.org/ecm2.htm (out of date for exponents over 100,000)

[henryzz]

thanks

[R.D. Silverman]

Originally Posted by henryzz

what effort has been put into factoring these numbers

Too much, IMO.