3 363 809 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
639828618700754678062959291613757849	36	118.9	2020-12-10 10:02:39

ECM

Digits	B1	Curves
25	50000	15 / 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)		Ty Cage Warren	8215B0E0568AB1E7	0
Verified (Factored)	1999-10-21	Murray Henderson	8215B0E0568AB1E7	994984

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-12-10	riccardo uberti	A451824897B98A40	1	2118301	5	3

P-1 factors

Date	Factor	B1	B2
2020-12-10	639828618700754678062959291613757849	4000000	150000000

History

Date	User	Type	Result
2020-12-10	Ben Delo	CERT	PRP Certification Proof certified good
2020-12-10	riccardo uberti	C-PRP	M3363809/639828618700754678062959291613757849 : A451824897B98A40 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-10	mikr	F-PM1	Factor: 639828618700754678062959291613757849 / (P-1, B1=4000000, B2=150000000, E=12)
2018-11-26	TJAOI	NF	no factor from 2^67 to 2^68
2017-04-05	Joss	NF-PM1	B1=330000, B2=3300000, E=6
2017-03-07	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-04	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-07-20	Squeeky_Squirrel	NF-PM1	B1=165000, B2=4290000, E=6
2015-02-11	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-11	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-29	Joss	NF-PM1	B1=95282
2014-06-09	Joss	NF-PM1	B1=76201
2012-11-15	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-10-15	USAFSS	NF-PM1	B1=55000, B2=907500, E=6
2011-09-03	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-06	Carsten Kossendey	NF-PM1	B1=15000, B2=206250
2009-03-27	S485122	NF	no factor from 2^60 to 2^61