3 581 791 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
4350075886263056023900663	25	81.8	2020-01-28 19:36:01

ECM

Digits	B1	Curves
25	50000	12 / 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)	1998-03-09	Grendel Drago	D4815CF42213C3E6	0
Verified (Factored)	2003-04-19	David Kreuter	D4815CF42213C3E6	2225506

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-01-31	ANONYMOUS	55C549F14213EDF5	1	1002543	5	3
Verified	2020-02-02	daveward2005	55C549F14213EDF5	1	103846	5	3

P-1 factors

Date	Factor	B1	B2
2020-01-28	4350075886263056023900663	3000000	90000000

History

Date	User	Type	Result
2022-05-24	Joss	NF-PM1	B1=100000, B2=130364850
2022-03-01	Joss	NF-PM1	B1=100000
2020-02-02	daveward2005	C-PRP	M3581791/4350075886263056023900663 : 55C549F14213EDF5 PRP: Verified PRP without proof (not generated)
2020-01-31	ANONYMOUS	C-PRP	M3581791/4350075886263056023900663 : 55C549F14213EDF5 PRP: Verified PRP without proof (not generated)
2020-01-28	BigBrother	F-PM1	Factor: 4350075886263056023900663 / (P-1, B1=3000000, B2=90000000, E=12)
2018-10-08	TJAOI	NF	no factor from 2^67 to 2^68
2017-01-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-05-08	Squeeky_Squirrel	NF-PM1	B1=225000, B2=6581250, E=12
2016-02-26	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-01-30	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-30	VictordeHollander	NF	no factor from 2^63 to 2^64
2012-07-02	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-12-26	Squeeky_Squirrel	NF-PM1	B1=85000, B2=1593750, E=6
2011-06-18	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-09	Carsten Kossendey	NF-PM1	B1=20000, B2=245000
2009-03-14	S485122	NF	no factor from 2^60 to 2^61