3 393 563 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
6276983236851190156753	22	72.4	2021-03-01 04:39:38

ECM

Digits	B1	Curves
25	50000	17 / 280

Estimated T-Level: 20.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)	1998-03-09	John Kurnas	A70604D89BB109C0	0
Verified (Factored)	1999-12-23	Jeremy Pharoah	A70604D89BB109C0	2775279

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-01	mrh	DF57306625E2ACD7	1	1348381	5	3

History

Date	User	Type	Result
2022-03-16	Joss	NF-PM1	B1=1000000, B2=127313550
2021-03-01	Greg	CERT	PRP Certification Proof certified good
2021-03-01	mrh	C-PRP	M3393563/6276983236851190156753 : DF57306625E2ACD7 PRP proof power = 7 PRP: Verified Proof certified good
2021-03-01	mnd9	F-ECM	Factor: 6276983236851190156753 / (ECM curve 2, B1=50000, B2=5000000, Sigma=5941890003575022)
2018-09-17	TJAOI	NF	no factor from 2^67 to 2^68
2017-03-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-28	Joss	NF-PM1	B1=604708, B2=4372500, E=6
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-10-28	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4372500, E=6
2015-04-04	Gordon Spence	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=97826
2014-07-04	Joss	NF-PM1	B1=78913
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-23	USAFSS	NF-PM1	B1=60000, B2=945000, E=6
2011-08-19	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-11	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-25	S485122	NF	no factor from 2^60 to 2^61