1 839 743 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
971717280196909200199664431	27	89.7	2020-03-11 21:59:15

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Jason Heilman	EB1CD0A75BFDE583	0
Verified (Factored)	1999-01-02	Olli Heikkilä	EB1CD0A75BFDE583	446316
Verified (Factored)	2015-06-27	MadPoo	EB1CD0A75BFDE583	152547

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-12	Jinyuan Wang	6D1EFEA3321676BB	1	977352	5	3
Verified	2020-03-13	oodaira	6D1EFEA3321676BB	1	857001	5	3

History

Date	User	Type	Result
2020-03-13	oodaira	C-PRP	M1839743/971717280196909200199664431 : 6D1EFEA3321676BB PRP: Verified PRP without proof (not generated)
2020-03-12	Jinyuan Wang	C-PRP	M1839743/971717280196909200199664431 : 6D1EFEA3321676BB PRP: Verified PRP without proof (not generated)
2020-03-11	mnd9	F-ECM	Factor: 971717280196909200199664431 / (ECM curve 1, B1=50000, B2=5000000, Sigma=5380492991924932)
2019-06-10	TJAOI	NF	no factor from 2^67 to 2^68
2018-08-09	Joss	NF-PM1	B1=1839743, B2=183974300, E=12
2018-01-08	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-05	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-07	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-06-27	MadPoo	C-LL	EB1CD0A75BFDE583
2015-04-27	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-27	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-23	Joss	NF-PM1	B1=169776
2014-05-19	Joss	NF-PM1	B1=134888
2011-02-10	Carsten Kossendey	NF-PM1	B1=100000, B2=1675000, E=6
2011-01-21	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-23	Architects Cubed	NF	no factor from 2^60 to 2^61