11 437 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
309142111	9	28.2	old
186898856327	12	37.4	2008-08-26 19:58:34
197852531906119784209326649	27	87.4	2008-10-16 23:57:25

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	3715 / 9201

Estimated T-Level: 42.0 ⓘ

TF below 2^135 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	5143516A1F178C26	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	5143516A1F178C26	3	0	1	3
Verified	2017-12-07	ATH	5143516A1F178C26	3	10376	1	3
Unverified	2020-04-17	Oliver Kruse	738B43AA312D89__	3	11053	5	3

P-1 factors

Date	Factor	B1	B2
2023-01-20	197852531906119784209326649	100000000000	122192573512709696

History

Date	User	Type	Result
2023-01-20	-Anonymous-	F-PM1	Factor: 197852531906119784209326649 / (P-1, B1=100000000000, B2=122192573512709700)
2020-04-17	Oliver Kruse	C-PRP	M11437/309142111/186898856327/197852531906119784209326649 : 738B43AA312D89__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26 PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M11437/309142111/186898856327/197852531906119784209326649 : 5143516A1F178C26 PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-10-16	-Anonymous-	F-ECM	Factor: 197852531906119784209326649
2008-08-26	-Anonymous-	F	Factor: 186898856327