9 511 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
95111	5	16.5	old
1366035502967	13	40.3	old
200600135818871	15	47.5	old
4851989306546260765473475368830543537430801721	46	151.8	2024-09-21 14:01:32

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	6969 / 16550

Estimated T-Level: 47.1 ⓘ

TF below 2^151 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-09-21	Oliver Kruse	C8E824BEAE080E38	3	0	1	3
Factored	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	C8E824BEAE080E38	3	1527	1	3
Factored	No proof (small exponent)	2020-04-17	Oliver Kruse	5950BD85C58E8B18	3	1577	5	3
Factored	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	5950BD85C58E8B18	3	5638	5	3
Verified	No proof (small exponent)	2024-09-21	nordi	5950BD85C58E8B18	4	6744	5	3

History

Date	User	Type	Result
2025-03-31	masser	NF-PP1	Start=132/23, B1=1000000000, B2=999000000000
2024-09-21	nordi	C-PRP	M9511/95111/1366035502967/200600135818871/4851989306546260765473475368830543537430801721 : 5950BD85C58E8B18
2024-09-21	nordi	F-ECM	Factor: 4851989306546260765473475368830543537430801721 / ECM curve 718, B1=45000000, B2=1117403522235, Edwards Sigma=4957092462211779
2024-07-01	kkmrkkblmbrbk	C-PRP	M9511/1366035502967/200600135818871/95111 : 5950BD85C58E8B18
2023-06-28	JacobZ	NF-PM1	B1=61000000000, B2=254995794420917550
2022-02-03	ANONYMOUS	NF-PM1	B1=100000000, B2=30555685210050
2022-02-03	-anonymous-	NF-PM1	B1=50000, B2=15277839797220
2020-04-17	Oliver Kruse	C-PRP	M9511/95111/1366035502967/200600135818871 : 5950BD85C58E8B18
2017-10-12	kkmrkkblmbrbk	C-PRP	M9511/95111/1366035502967/200600135818871 : C8E824BEAE080E38
2017-09-21	Oliver Kruse	C-PRP	M9511/95111/1366035502967/200600135818871 : C8E824BEAE080E38
2017-09-21	Oliver Kruse	C-PRP	M9511/95111/1366035502967/200600135818871 : C8E824BEAE080E38