11 287 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
13554264839	11	33.7	old
2649104059489823244390646324558199	34	111.0	2013-12-01 00:24:19

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	2895 / 9201

Estimated T-Level: 41.6 ⓘ

TF below 2^133 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	8BD523F601848B2B	2	0	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	8BD523F601848B2B	2	0	1	3
Verified	No proof (small exponent)	2017-12-07	ATH	8BD523F601848B2B	2	4688	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	9F56156B59495371	2	5040	5	3
Verified	No proof (small exponent)	2024-07-01	kkmrkkblmbrbk	9F56156B59495371	2	8643	5	3

History

Date	User	Type	Result
2025-02-20	masser	NF-PP1	Start=115/13, B1=640000000, B2=639360000000
2025-02-12	masser	NF-PP1	Start=6/5, B1=640000000, B2=639360000000
2025-01-24	masser	NF-PP1	Start=2/7, B1=640000000, B2=639360000000
2024-07-01	kkmrkkblmbrbk	C-PRP	M11287/13554264839/2649104059489823244390646324558199 : 9F56156B59495371
2023-01-20	-anonymous-	NF-PM1	B1=100000000000, B2=122192573512709700
2020-04-17	Oliver Kruse	C-PRP	M11287/13554264839/2649104059489823244390646324558199 : 9F56156B59495371
2017-12-07	ATH	C-PRP	M11287/13554264839/2649104059489823244390646324558199 : 8BD523F601848B2B
2017-10-02	kkmrkkblmbrbk	C-PRP	M11287/13554264839/2649104059489823244390646324558199 : 8BD523F601848B2B
2017-09-21	Oliver Kruse	C-PRP	M11287/13554264839/2649104059489823244390646324558199 : 8BD523F601848B2B
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=10000000000, E=12
2013-12-01	BloodIce	F-ECM	Factor: 2649104059489823244390646324558199