655 685 803 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with PRP test

No factors below 2⁸⁴

TF target 2⁸³

P-1

B1 =	8000000
B2 =	1803044880

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	119 / 640

Estimated T-Level: 25.9 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Shift	Type	Base
Verified	PRP without proof (not generated)	2020-03-21	Kriesel	92F97A1109451EC2	0	1	3
Verified	Certified Good Power=10	2022-07-26	Kriesel	92F97A1109451EC2	0	1	3

History

Date	User	Type	Result
2025-01-22	Kriesel	NF-PP1	Start=6/5, B1=8000000, B2=1800000000
2024-10-10	Kriesel	NF-PP1	Start=187/41, B1=8000000, B2=1800000000
2024-05-15	Kriesel	NF-PP1	Start=2/7, B1=8000000, B2=1800000000
2024-03-04	Kriesel	NF-PM1	B1=8000000, B2=1803044880
2022-08-04	Kriesel	CERT	Proof certified good
2022-07-26	Kriesel	C-PRP	92F97A1109451EC2 Proof Certified Good Proof Power: 10
2020-03-21	Kriesel	C-PRP	92F97A1109451EC2 Proof Certified Good Proof Power: 10
2019-11-09	Kriesel	NF-PM1	B1=4735000, B2=105353750
2019-09-02	Kriesel	NF	no factor TF: 83-84
2019-08-24	Kriesel	NF	no factor TF: 82-83
2019-08-20	Kriesel	NF	no factor TF: 81-82
2019-08-18	Kriesel	NF	no factor TF: 80-81
2019-08-17	Kriesel	NF	no factor TF: 79-80
2019-08-16	Kriesel	NF	no factor TF: 78-79
2019-08-15	Kriesel	NF	no factor TF: 77-78
2019-08-15	Kriesel	NF	no factor TF: 75-76
2019-08-15	Kriesel	NF	no factor TF: 76-77
2019-08-15	Kriesel	NF	no factor TF: 74-75
2019-08-15	Kriesel	NF	no factor TF: 72-73
2019-08-15	Kriesel	NF	no factor TF: 73-74
2019-08-15	Kriesel	NF	no factor TF: 71-72
2019-08-15	Kriesel	NF	no factor TF: 70-71
2018-10-08	Niels_Mache_Nextcloud	NF	no factor TF: 69-70
2017-07-20	sasaki	NF	no factor TF: 68-69
2017-02-12	sasaki	NF	no factor TF: 67-68
2014-06-29	sasaki	NF	no factor TF: 66-67
2014-03-17	america64	NF	no factor TF: 65-66

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