4 048 969 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
3408167620289620445711	22	71.5	2021-06-16 06:25:57

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)		Piotr Zygadlo	F986A583E896D656	0
Verified (Factored)	1999-10-07	chris clark	F986A583E896D656	198065

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-17	tottenhoff	FF5706BB923F6CA7	1	3615523	5	3

History

Date	User	Type	Result
2021-06-17	Simon Josefsson	CERT	PRP Certification Proof certified good
2021-06-17	tottenhoff	C-PRP	M4048969/3408167620289620445711 : FF5706BB923F6CA7 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-16	ATH	F-PP1	Start=2/7, B1=2500000, Factor: 3408167620289620445711
2020-08-18	mikr	NF	no factor from 2^69 to 2^70
2020-08-18	mikr	NF	no factor from 2^68 to 2^69
2018-10-23	Yxinity	NF	no factor from 2^67 to 2^68
2016-11-19	Ismo Laitela	NF-PM1	B1=2189464, B2=63494458, E=12
2016-09-14	kkmrkkblmbrbk	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-05-21	snme2pm1	NF	no factor from 2^65 to 2^66
2013-10-09	David Campeau	NF	no factor from 2^64 to 2^65
2013-08-16	Jayder	NF	no factor from 2^63 to 2^64
2013-06-05	Squeeky_Squirrel	NF-PM1	B1=120000, B2=2310000, E=6
2011-06-29	USAFSS	NF-PM1	B1=40000, B2=580000
2011-05-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-10-08	Grant McCracken	NF	no factor from 2^61 to 2^62
2009-07-16	Carsten Kossendey	NF-PM1	B1=20000, B2=295000