11 971 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
11611871	8	23.5	old
23175857	8	24.5	2008-08-26 19:58:35
45647912969	11	35.4	2008-08-26 19:58:35
1282509129519674521	19	60.2	2008-08-29 02:24:28

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1282 / 9201

Estimated T-Level: 40.7 ⓘ

TF below 2^130 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	A774586921285C60	4	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	A774586921285C60	4	0	1	3
Verified	2017-12-07	ATH	A774586921285C60	4	11875	1	3
Unverified	2020-04-17	Oliver Kruse	30F8E5D0EA7C2A__	4	1145	5	3

History

Date	User	Type	Result
2023-04-06	-Anonymous-	NF-PM1	B1=100000000000, B2=122192573512709700
2020-04-17	Oliver Kruse	C-PRP	M11971/11611871/23175857/45647912969/1282509129519674521 : 30F8E5D0EA7C2A__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60 PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M11971/11611871/23175857/45647912969/1282509129519674521 : A774586921285C60 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-08-29	-Anonymous-	F-ECM	Factor: 1282509129519674521
2008-08-26	-Anonymous-	F	Factor: 45647912969
2008-08-26	-Anonymous-	F	Factor: 23175857