12 373 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
2282571041	10	31.1	old
23482147543	11	34.5	2008-08-26 19:58:36

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	2330 / 9201

Estimated T-Level: 41.3 ⓘ

TF below 2^132 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	B05BF8F607E18642	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	B05BF8F607E18642	2	3965	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	0C5831A0753BB878	2	9599	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	0C5831A0753BB878	2	5970	5	3

History

Date	User	Type	Result
2025-03-06	masser	NF-PP1	Start=178/47, B1=430000000, B2=429570000000
2025-02-20	masser	NF-PP1	Start=6/5, B1=430000000, B2=429570000000
2025-01-19	masser	NF-PP1	Start=2/7, B1=430000000, B2=429570000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M12373/2282571041/23482147543 : 0C5831A0753BB878
2023-05-13	-anonymous-	NF-PM1	B1=100000000000, B2=120417199046794650
2020-04-17	Oliver Kruse	C-PRP	M12373/2282571041/23482147543 : 0C5831A0753BB878
2017-10-12	kkmrkkblmbrbk	C-PRP	M12373/2282571041/23482147543 : B05BF8F607E18642
2017-09-21	Oliver Kruse	C-PRP	M12373/2282571041/23482147543 : B05BF8F607E18642
2017-09-21	Oliver Kruse	C-PRP	M12373/2282571041/23482147543 : B05BF8F607E18642
2016-09-09	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-08-26	-anonymous-	F	Factor: 23482147543