383 147 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
201368948117725858964475329791951	33	107.3	2019-04-11 01:39:00

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	343 / 640

Estimated T-Level: 27.7 ⓘ

TF below 2^87 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	7A51	0
Verified (Factored)		Mike Johnson	60B55EA19D7A7A51	0
Verified (Factored)		David Tegerdine	60B55EA19D7A7A51	0
Verified (Factored)		Eivind Triel	60B55EA19D7A7A51	10558
Verified (Factored)	2016-06-01	MadPoo	60B55EA19D7A7A51	267629

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-12	matzetoni	F0581FDB80A79FE3	1	322271	5	3
Verified	2019-04-13	-Anonymous-	F0581FDB80A79FE3	1	41129	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-13	-Anonymous-	C-PRP	M383147/201368948117725858964475329791951 : F0581FDB80A79FE3 PRP: Verified PRP without proof (small exponent)
2019-04-12	matzetoni	C-PRP	M383147/201368948117725858964475329791951 : F0581FDB80A79FE3 PRP: Verified PRP without proof (small exponent)
2019-04-11	alex	F-ECM	Factor: 201368948117725858964475329791951 / (ECM curve 93, B1=250000, B2=25000000, Sigma=8679098448827894)
2018-02-03	BloodERazor	NF	no factor from 2^64 to 2^65
2017-01-04	mikr	NF-PM1	B1=60000000, B2=3000000000, E=12
2016-06-01	MadPoo	C-LL	60B55EA19D7A7A51
2015-11-23	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-23	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2012-07-27	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-11-16	lycorn	NF	no factor from 2^60 to 2^61
2009-01-09	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-06	Sturle Sunde	NF	no factor from 2^58 to 2^59