14 957 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
119657	6	16.9	old
8116086487463	13	42.9	2008-08-26 19:58:44

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1417 / 9201

Estimated T-Level: 40.8 ⓘ

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

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	F2AA28AD5CE21F07	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	F2AA28AD5CE21F07	2	967	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	BBDEE6EB2E304CDB	2	7986	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	BBDEE6EB2E304CDB	2	4912	5	3

History

Date	User	Type	Result
2025-02-04	masser	NF-PP1	Start=2/7, B1=355000000, B2=354645000000
2025-02-02	masser	NF-PP1	Start=111/29, B1=355000000, B2=354645000000
2025-01-13	masser	NF-PP1	Start=6/5, B1=355000000, B2=354645000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M14957/119657/8116086487463 : BBDEE6EB2E304CDB
2024-05-21	Anton Repko	NF-PM1	B1=1000000000000, B2=1401075893663576130
2022-02-18	Ethan O'Connor	NF-PM1	B1=10000000000, B2=91244305394882640
2022-02-06	ANONYMOUS	NF-PM1	B1=50000
2020-04-17	Oliver Kruse	C-PRP	M14957/119657/8116086487463 : BBDEE6EB2E304CDB
2017-10-12	kkmrkkblmbrbk	C-PRP	M14957/119657/8116086487463 : F2AA28AD5CE21F07
2017-09-21	Oliver Kruse	C-PRP	M14957/119657/8116086487463 : F2AA28AD5CE21F07
2017-09-21	Oliver Kruse	C-PRP	M14957/119657/8116086487463 : F2AA28AD5CE21F07
2008-08-26	-anonymous-	F	Factor: 8116086487463