12 601 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
384646744113386483513	21	68.4	old

P-1 factors

Date	Factors	B1	B2
2023-05-21	No new factors discovered	100000000000	120417199046794656

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1465 / 9201

Estimated T-Level: 40.8 ⓘ

TF below 2^131 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	3A1B9C8AB4EA8412	1	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	3A1B9C8AB4EA8412	1	3661	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	A0B6804B3354461F	1	7385	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	A0B6804B3354461F	1	1982	5	3

History

Date	User	Type	Result
2025-03-12	masser	NF-PP1	Start=154/31, B1=430000000, B2=429570000000
2025-02-19	masser	NF-PP1	Start=6/5, B1=430000000, B2=429570000000
2025-01-18	masser	NF-PP1	Start=2/7, B1=430000000, B2=429570000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M12601/384646744113386483513 : A0B6804B3354461F
2023-05-21	-anonymous-	F-PM1	Factor: 384646744113386483513 / B1=100000000000, B2=120417199046794650
2022-02-05	Joss	NF-PM1	B1=1000000, B2=3910366209750
2020-04-17	Oliver Kruse	C-PRP	M12601/384646744113386483513 : A0B6804B3354461F
2017-10-12	kkmrkkblmbrbk	C-PRP	M12601/384646744113386483513 : 3A1B9C8AB4EA8412
2017-09-21	Oliver Kruse	C-PRP	M12601/384646744113386483513 : 3A1B9C8AB4EA8412
2017-09-21	Oliver Kruse	C-PRP	M12601/384646744113386483513 : 3A1B9C8AB4EA8412