Results

[frmky]

no factor for k*2^29+1 from 2^77 to 2^78 (k range: 550T to 1000T) [mmff 0.21 mfaktc_barrett89_F0_31gs]
no factor for k*2^29+1 from 2^78 to 2^79 (k range: 550T to 1000T) [mmff 0.21 mfaktc_barrett89_F0_31gs]

[frmky]

no factor for k*2^34+1 in k range: 700T to 1000T (84-bit factors) [mmff 0.22 mfaktc_barrett89_F32_63gs]

[Jatheski]

no factor for k*2^33+1 from 2^82 to 2^83 (k range: 700T to 1000T) [mmff 0.21 mfaktc_barrett89_F32_63gs]

[frmky]

no factor for k*2^40+1 in k range: 600T to 1000T (90-bit factors) [mmff 0.23 mfaktc_barrett96_F32_63gs]

[frmky]

no factor for k*2^100+1 from 2^143 to 2^144 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^100+1 from 2^144 to 2^145 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^100+1 from 2^145 to 2^146 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^101+1 from 2^144 to 2^145 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^101+1 from 2^145 to 2^146 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^101+1 from 2^146 to 2^147 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^102+1 from 2^145 to 2^146 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^102+1 from 2^146 to 2^147 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^102+1 from 2^147 to 2^148 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^103+1 from 2^146 to 2^147 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^103+1 from 2^147 to 2^148 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^103+1 from 2^148 to 2^149 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^104+1 from 2^147 to 2^148 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^104+1 from 2^148 to 2^149 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^104+1 from 2^149 to 2^150 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^105+1 from 2^148 to 2^149 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^105+1 from 2^149 to 2^150 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^105+1 from 2^150 to 2^151 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^106+1 from 2^149 to 2^150 (k range: 16T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^106+1 from 2^150 to 2^151 (k range: 0T to 50T) [mmff 0.21 mfaktc_barrett152_F96_127gs]
no factor for k*2^106+1 in k range: 35184372088832 to 50000000000000 (152-bit factors) [mmff 0.23 mfaktc_barrett152_F96_127gs]
no factor for k*2^107+1 in k range: 16000000000000 to 17592186044416 (151-bit factors) [mmff 0.23 mfaktc_barrett152_F96_127gs]
no factor for k*2^107+1 in k range: 17592186044416 to 35184372088832 (152-bit factors) [mmff 0.23 mfaktc_barrett152_F96_127gs]
no factor for k*2^107+1 in k range: 35184372088832 to 50000000000000 (153-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]
no factor for k*2^108+1 in k range: 16000000000000 to 17592186044416 (152-bit factors) [mmff 0.23 mfaktc_barrett152_F96_127gs]
no factor for k*2^108+1 in k range: 17592186044416 to 35184372088832 (153-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]
no factor for k*2^108+1 in k range: 35184372088832 to 50000000000000 (154-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]
no factor for k*2^109+1 in k range: 16000000000000 to 17592186044416 (153-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]
no factor for k*2^109+1 in k range: 17592186044416 to 35184372088832 (154-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]
no factor for k*2^109+1 in k range: 35184372088832 to 50000000000000 (155-bit factors) [mmff 0.23 mfaktc_barrett160_F96_127gs]

[frmky]

no factor for k*2^45+1 in k range: 500000000000000 to 562949953421312 (94-bit factors) [mmff 0.23 mfaktc_barrett96_F32_63gs]
no factor for k*2^45+1 in k range: 562949953421312 to 1000000000000000 (95-bit factors) [mmff 0.23 mfaktc_barrett96_F32_63gs]

[RichD]

Originally Posted by RichD

It looks like this is still available so I would like to reserve it.

MMFactor=127,2.5e15,2.8e15

And it will take 8 days on my GTX 560.

Done.

no factor for MM127 from 2^179 to 2^180 (k range: 2500T to 2800T) [mmff 0.21 mfaktc_barrett183_M127gs]

[frmky]

no factor for k*2^50+1 in k range: 300000000000000 to 562949953421312 (99-bit factors) [mmff 0.23 mfaktc_barrett108_F32_63gs]
no factor for k*2^50+1 in k range: 562949953421312 to 1000000000000000 (100-bit factors) [mmff 0.23 mfaktc_barrett108_F32_63gs]

[Batalov]

I am desperately searching for the word "has" in this thread...

[Jatheski]

no factor for k*2^41+1 in k range: 600T to 1000T (91-bit factors) [mmff 0.23 mfaktc_barrett96_F32_63gs]
no factor for k*2^42+1 in k range: 600T to 1000T (92-bit factors) [mmff 0.23 mfaktc_barrett96_F32_63gs]

[aketilander]

Originally Posted by Batalov

I am desperately searching for the word "has" in this thread...

Well we are doing our best ;-) but you know only 13 factors of double Mersennes (with prime exponent) have ever been discovered. The first one in 1957 and only one after 2005, so we may have to wait for a while for the next one. ;-)