1 821 821 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
2953620920993753590103	22	71.3	2021-04-09 16:11:54
41450530895203527765583	23	75.1	2016-08-27 09:15:37

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)		Ken Kriesel	CB31EB82C84359A2	0
Verified (Factored)	1999-01-10	chris clark	CB31EB82C84359A2	320763
Verified (Factored)	2015-07-04	MadPoo	CB31EB82C84359A2	46106

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-03	Oliver Kruse	A8FC3796932FAF72	1	0	1	3
Verified (Factored)	2017-11-06	ATH	A8FC3796932FAF72	1	243429	1	3
Verified	2021-04-10	XZT	D9B294CCE60D1FA2	2	1736944	5	3

History

Date	User	Type	Result
2021-04-10	Ben Delo	CERT	PRP Certification Proof certified good
2021-04-10	XZT	C-PRP	M1821821/41450530895203527765583/2953620920993753590103 : D9B294CCE60D1FA2 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-09	TJAOI	F-ECM	Factor: 2953620920993753590103 / (ECM curve 113, B1=50000, B2=6600000)
2017-11-06	ATH	C-PRP	M1821821/41450530895203527765583 : A8FC3796932FAF72 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1821821/41450530895203527765583 : A8FC3796932FAF72 PRP: Verified (Factored) PRP without proof (not generated)
2016-08-27	bam	F-ECM	Factor: 41450530895203527765583 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2015-09-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-04	MadPoo	C-LL	CB31EB82C84359A2
2015-06-02	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-04-25	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-25	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-22	Joss	NF-PM1	B1=170462
2014-05-19	Joss	NF-PM1	B1=135231
2011-10-02	USAFSS	NF-PM1	B1=100000, B2=1675000, E=6
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-10	Architects Cubed	NF	no factor from 2^60 to 2^61