9 371 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 3 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
18743	5	14.2	old
7281660583	10	32.8	old
1253698354127	13	40.2	old

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	6772 / 16550

Estimated T-Level: 47.0 ⓘ

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
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	9AE432CA72B6BB90	3	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	9AE432CA72B6BB90	3	5663	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	F35214CC003FFC7A	3	7463	5	3
Factored	No proof (small exponent)	2022-05-12	Jorge Coveiro	F35214CC003FFC7A	1	9308	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	F35214CC003FFC7A	3	1424	5	3

History

Date	User	Type	Result
2025-04-06	masser	NF-PP1	Start=188/67, B1=1000000000, B2=999000000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M9371/1253698354127/18743/7281660583 : F35214CC003FFC7A
2023-07-04	JacobZ	NF-PM1	B1=62000000000, B2=254047854677867250
2022-05-12	Jorge Coveiro	C-PRP	M9371/18743 : F35214CC003FFC7A
2022-01-03	ANONYMOUS	NF-PM1	B1=100000000, B2=5133438650340
2020-04-17	Oliver Kruse	C-PRP	M9371/18743/7281660583/1253698354127 : F35214CC003FFC7A
2017-10-12	kkmrkkblmbrbk	C-PRP	M9371/18743/7281660583/1253698354127 : 9AE432CA72B6BB90
2017-09-21	Oliver Kruse	C-PRP	M9371/18743/7281660583/1253698354127 : 9AE432CA72B6BB90
2017-09-21	Oliver Kruse	C-PRP	M9371/18743/7281660583/1253698354127 : 9AE432CA72B6BB90