2 503 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
192030161	9	27.5	old
271110371579809135484488546748281791049761891239	48	157.6	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	16550 / 16550
55	110000000	9277 / 40830

Estimated T-Level: 51.1 ⓘ

TF below 2^165 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	80D5D8EE05ED8A23	2	0	1	3
Verified	No proof (small exponent)	2017-10-02	kkmrkkblmbrbk	80D5D8EE05ED8A23	2	0	1	3
Verified	No proof (small exponent)	2017-12-07	ATH	80D5D8EE05ED8A23	2	591	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	5C6A706CB73E6D97	2	1503	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	5C6A706CB73E6D97	2	697	5	3

History

Date	User	Type	Result
2025-04-08	masser	NF-PP1	Start=85/13, B1=4400000000, B2=4395600000000
2024-05-20	masser	NF-PM1	B1=100000000000, B2=111575127928664400
2024-02-03	Wentao Huang	C-PRP	M2503/192030161/271110371579809135484488546748281791049761891239 : 5C6A706CB73E6D97
2021-07-05	ViliamF	NF-PM1	B1=1000000000, B2=191000000000
2021-07-04	ViliamF	NF-PM1	B1=100000000, B2=13100000000
2020-04-17	Oliver Kruse	C-PRP	M2503/192030161/271110371579809135484488546748281791049761891239 : 5C6A706CB73E6D97
2017-12-07	ATH	C-PRP	M2503/192030161/271110371579809135484488546748281791049761891239 : 80D5D8EE05ED8A23
2017-10-02	kkmrkkblmbrbk	C-PRP	M2503/192030161/271110371579809135484488546748281791049761891239 : 80D5D8EE05ED8A23
2017-09-21	Oliver Kruse	C-PRP	M2503/known_factors : 80D5D8EE05ED8A23