4 015 987 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
85077294284886253076854009	26	86.1	2017-11-13 11:58:07
2107856332730061202797853001	28	90.8	2017-11-13 11:58:07

ECM

Digits	B1	Curves
25	50000	9 / 280

Estimated T-Level: 20.2 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Richard Otter	1FE95D7212CCC3FF	0
Verified (Factored)	1998-06-28	Steve Rogreson	1FE95D7212CCC3FF	0
Verified (Factored)	2015-11-14	MadPoo	1FE95D7212CCC3FF	434832

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-14	kkmrkkblmbrbk	46B7B5A0A11E37CA	2	144925	5	3
Verified	2018-01-05	ATH	46B7B5A0A11E37CA	2	2722966	5	3

P-1 factors

Date	Factor	B1	B2
2017-11-13	179330713529936532244212168426955870150072272719531009	4600000	125000000

History

Date	User	Type	Result
2018-01-05	ATH	C-PRP	M4015987/85077294284886253076854009/2107856332730061202797853001 : 46B7B5A0A11E37CA PRP: Verified PRP without proof (not generated)
2017-11-14	kkmrkkblmbrbk	C-PRP	M4015987/85077294284886253076854009/2107856332730061202797853001 : 46B7B5A0A11E37CA PRP: Verified PRP without proof (not generated)
2017-11-13	mikr	F-PM1	Factor: 179330713529936532244212168426955870150072272719531009 / (P-1, B1=4600000, B2=125000000, E=12)
2016-09-01	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^63
2015-11-14	MadPoo	C-LL	1FE95D7212CCC3FF
2015-05-18	snme2pm1	NF	no factor from 2^65 to 2^66
2015-01-03	Nesowa	NF-PM1	B1=225000, B2=4556250, E=6
2013-10-23	David Campeau	NF	no factor from 2^64 to 2^65
2013-07-28	Jayder	NF	no factor from 2^63 to 2^64
2013-06-19	Squeeky_Squirrel	NF-PM1	B1=120000, B2=2280000, E=6
2009-11-21	USAFSS	NF-PM1	B1=40000, B2=610000, E=4
2009-11-07	GrunwalderGIMP	NF	no factor from 2^1 to 2^63