2 168 879 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
672595266530295570431020564076651401	36	119.0	2019-10-28 22:45:51

ECM

Digits	B1	Curves
25	50000	94 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Andrew Gaul	116EFFA26BC3FAAE	0
Verified (Factored)	1999-07-27	Roberto Cornacchia	116EFFA26BC3FAAE	154340
Verified (Factored)	2005-03-06	Te-wei Hsu	116EFFA26BC3FAAE	236128

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-10-29	mnd9	C7949CB882AD50DC	1	368700	5	3
Verified	2019-10-31	arnaud	C7949CB882AD50DC	1	1529348	5	3

P-1 factors

Date	Factor	B1	B2
2019-10-28	672595266530295570431020564076651401	5000000	200000000

History

Date	User	Type	Result
2019-10-31	arnaud	C-PRP	M2168879/672595266530295570431020564076651401 : C7949CB882AD50DC PRP: Verified PRP without proof (not generated)
2019-10-29	mnd9	C-PRP	M2168879/672595266530295570431020564076651401 : C7949CB882AD50DC PRP: Verified PRP without proof (not generated)
2019-10-28	mikr	F-PM1	Factor: 672595266530295570431020564076651401 / (P-1, B1=5000000, B2=200000000, E=12)
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2016-11-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-12-17	HBendtz	NF-PM1	B1=700000, B2=21000000, e=12
2015-03-25	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-25	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-02	Joss	NF-PM1	B1=134593
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-21	markr	NF-PM1	B1=105000, B2=2047500, E=6
2011-01-15	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-06	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61