12 671 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
25343	5	14.6	old
99847481	8	26.6	2008-08-26 19:58:38

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1267 / 9201

Estimated T-Level: 40.7 ⓘ

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

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	A5F2512455D601B3	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	A5F2512455D601B3	2	9790	1	3
Unverified	2020-04-17	Oliver Kruse	4B6584BA29DC97__	2	11248	5	3
Verified (Factored)	2022-05-12	Jorge Coveiro	4B6584BA29DC97E5	1	1997	5	3

History

Date	User	Type	Result
2023-05-22	-Anonymous-	NF-PM1	B1=100000000000, B2=120417199046794650
2022-05-12	Jorge Coveiro	C-PRP	M12671/25343 : 4B6584BA29DC97E5 PRP: Verified (Factored) PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M12671/25343/99847481 : 4B6584BA29DC97E5 PRP: Verified (Factored) PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M12671/25343/99847481 : A5F2512455D601B3 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M12671/25343/99847481 : A5F2512455D601B3 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M12671/25343/99847481 : A5F2512455D601B3 PRP without proof (not generated)
2008-08-26	-Anonymous-	F	Factor: 99847481