331 543 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
390816212885978055491926175203831	33	108.3	2019-03-22 10:49:02

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	6E96	0
Verified (Factored)		Unknown	6E96	0
Verified (Factored)		Guillermo Ballester Valor	143D4303FDB3EE96	0
Verified (Factored)		Eivind Triel	143D4303FDB3EE96	320260
Verified (Factored)	2002-01-22	Dennis Pope	143D4303FDB3EE96	123793

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-03-22	ATH	75483AAB2470B01D	1	143553	5	3
Verified	2019-03-23	kkmrkkblmbrbk	75483AAB2470B01D	1	90099	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-03-23	kkmrkkblmbrbk	C-PRP	M331543/390816212885978055491926175203831 : 75483AAB2470B01D PRP: Verified PRP without proof (small exponent)
2019-03-22	ATH	C-PRP	M331543/390816212885978055491926175203831 : 75483AAB2470B01D PRP: Verified PRP without proof (small exponent)
2019-03-22	alex	F-ECM	Factor: 390816212885978055491926175203831 / (ECM curve 413, B1=250000, B2=25000000, Sigma=3063453570773013)
2018-01-27	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-07-15	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2015-12-09	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-09	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-23	NR	NF	no factor from 2^61 to 2^62
2013-04-07	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-01-09	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-06	Joss	NF-PM1	B1=1390266
2009-01-23	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-29	Sturle Sunde	NF	no factor from 2^58 to 2^59