The Great Internet Mersenne Prime Search
GPU to 72

P-1 Cost per Factor found in LL range

Range	Run	F	GHzDays	Run	F	GHzDays	Run	F	GHzDays	Run	F	GHzDays	Run	F	GHzDays	Run	F	GHzDays
	69			70			71			72			73			74
45M	25	2	34.8	3	1	5.6	67	2	75.0	468	12	67.4	11	1	22.3	10	0	∞
46M	15	1	47.2	9	0	∞	95	4	61.9	301	4	159.1	19	2	23.7	2	0	∞
47M	11	1	30.5	62	1	151.9	182	13	35.6	628	20	64.6	14	1	30.4
48M	14	0	∞	338	17	58.4	288	11	70.6	606	18	80.3	34	2	37.6
49M	14	1	38.1	222	10	66.6	473	21	63.0	961	34	74.1	65	2	75.8	2	0	∞
50M	1	0	∞	25	0	∞	98	3	99.9	823	38	56.7				2	0	∞
51M				30	2	48.4	93	2	131.0	786	47	47.9				1	0	∞
52M				52	0	∞	456	13	85.9	4,540	164	62.6	90	5	49.2	25	0	∞
53M							231	10	72.1	31	3	31.0	3	0	∞
54M							569	9	105.5	2,072	81	75.4	41	1	124.0	47	3	38.4
55M							25	0	∞	1,161	60	66.7	243	12	64.4	6	2	9.3
56M							53	1	26.0	423	11	123.0	29	2	46.1	1	0	∞
57M							56	0	∞	139	6	57.6	19	1	59.5	2	0	∞
58M							106	4	110.9	660	21	78.4	383	12	106.6	17	0	∞
59M										1	0	∞	25	0	∞
Total	80	5	47.2	741	31	66.6	2,792	93	73.2	13,600	519	67.3	976	41	73.4	115	5	61.3

Note: the bit-level shown is to what level the candidate had been trial factored to before the P-1 attempt, not the bit-level of the factor found