321 193 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
3267398080550712979350386761	28	91.4	2019-03-15 00:09:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	598 / 640

Estimated T-Level: 29.7 ⓘ

TF below 2^94 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	59DC	0
Verified (Factored)		Unknown	59DC	0
Verified (Factored)		Guillermo Ballester Valor	E22871134C33D9DC	0
Verified (Factored)		Eivind Triel	E22871134C33D9DC	159139
Verified (Factored)	2002-01-15	Dennis Pope	E22871134C33D9DC	164812

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-03-16	_p95holder_	F25B20CB4CAC81D7	1	63760	5	3
Verified	2019-03-16	ANONYMOUS	F25B20CB4CAC81D7	1	162487	5	3
Verified	2019-03-17	kkmrkkblmbrbk	F25B20CB4CAC81D7	1	14884	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-03-17	kkmrkkblmbrbk	C-PRP	M321193/3267398080550712979350386761 : F25B20CB4CAC81D7 PRP: Verified PRP without proof (small exponent)
2019-03-16	ANONYMOUS	C-PRP	M321193/3267398080550712979350386761 : F25B20CB4CAC81D7 PRP: Verified PRP without proof (small exponent)
2019-03-16	_p95holder_	C-PRP	M321193/3267398080550712979350386761 : F25B20CB4CAC81D7 PRP: Verified PRP without proof (small exponent)
2019-03-15	alex	F-ECM	Factor: 3267398080550712979350386761 / (ECM curve 407, B1=250000, B2=25000000, Sigma=4717066951267210)
2018-01-28	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-21	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-12-08	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-08	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-22	NR	NF	no factor from 2^61 to 2^62
2012-04-27	David Campeau	NF	no factor from 2^60 to 2^61
2012-01-18	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-06	Joss	NF-PM1	B1=1448628
2009-01-23	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59