is 2 2764207 - 1
has 832110 decimal digits
takes 0.213 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7F62A96452EE8A98double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26943.190368.1159%2700000840000000.79847.0702%43.988770.3702%2.2543%
PrimeNet2590.027862.7119%120002200000.00262.8551%0.030463.7765%1.0646%
GPU722630.577465.0794%150002400000.00311.7456%0.580465.6889%0.6096%
Difference+6+42.6129+3.0366%+2685000+83760000+0.7954+5.3247%+43.4083+4.6813%+4.6813%

Known prime factors:
No known factors for M2764207

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-16T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.195%
2010-12-02T14:12:00markrtiny1100002365000---0.026--2.315%
2016-08-11T02:58:16Jocelyn LaroucheManual testing14200047300006---0.044--2.846%
2016-10-27T01:50:41Jocelyn Larouchelow 4M170400170400---0.019--0.987%
2016-12-24T02:28:24Jocelyn Larouchelow 4M204480204480---0.023--1.089%
2017-01-25T16:27:01mikrMSI27000008400000012---0.798--7.070%
2017-02-25T21:08:00Jocelyn Larouchelow 4M29445129445106---0.049--2.875%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-21T00:00:00ANONYMOUSv4_computers21259--0.028--
2016-02-23T16:29:21Mark RoseManual testing259260--0.028--
2009-01-30T20:47:00Sturle Sundegofy.ifi260261--0.056--
2012-03-15T10:06:00markroldgamer261262--0.111--
2013-01-10T10:19:00dbaughManual testing262263--0.355--
2015-04-21T09:20:00VictordeHollanderManual testing263264--0.710--
2015-04-21T09:20:00VictordeHollanderManual testing264265--1.352--
2016-02-08T11:13:50ramgeisManual testing265266--2.703--
2017-10-12T12:41:20Gordon SpenceManual testing266267--5.407--
2019-02-21T01:08:08chuenkitManual testing267268--10.81--
2021-06-07T10:36:17TJAOIManual testing268269--21.63--


ECM factoring results:

Old Calculation Method

Total ECM effort:13.314 GHz-days
Estimated T-Level:22.268
DigitsB1CurvesCompleteFacMiss
2011000127 / 1001.27027.904%
2550000127 / 2800.45463.484%

New Calculation Method

Total ECM effort:13.314 GHz-days
Estimated T-Level:22.268
DigitsB1CompleteFacMiss
20110004.9070.739%
25500000.45463.510%
302500000.02997.176%
3510000000.00199.866%


ECM Summary

B1B2factorcurvesGHz-days
50000500000012012.48
50000675000070.838


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-05-16T00:00:00ANONYMOUSv4_computers7F62A96452EE8A980.213
1999-05-02T00:00:00ANONYMOUSv4_computers7F62A96452EE8A980.213
2018-08-19T00:08:00kkmrkkblmbrbkold7F62A96452EE8A980.213


PRP results:
No PRP results for M2764207


P-1 factor-bounds graph:
B1 = 2700000, B2 = 84000000 (P-1 stage 2)
B1 = 2700000 (P-1 stage 1)
B1 = 294451, B2 = 2944510 (P-1 stage 2)
B1 = 142000, B2 = 4730000 (P-1 stage 2)
B1 = 294451 (P-1 stage 1)
B1 = 110000, B2 = 2365000 (P-1 stage 2)
B1 = 204480 (P-1 stage 1)
B1 = 170400 (P-1 stage 1)
B1 = 142000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-07T09:51:19+00:00