is 2 1970279 - 1
has 593114 decimal digits
takes 0.130 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD4B29FEED7618F1Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26960.593969.5652%19702792462848751.45697.8041%62.050771.9404%2.3751%
PrimeNet2580.019563.7931%80001400000.00142.4717%0.020964.6880%0.8949%
GPU722620.311866.1290%80001000000.00121.1959%0.313166.5341%0.4051%
Difference+7+60.2820+3.4362%+1962279+246184875+1.4556+6.6081%+61.7377+5.4063%+5.4063%

Known prime factors:
No known factors for M1970279

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-29T11:30:00kurlyhex100000030000000---0.246--5.204%
2018-01-20T12:51:30Jocelyn Larouchelow 4M19702793000000012---0.333--5.550%
2018-02-14T12:53:58Jocelyn Larouchelow 4M19702796000000012---0.489--6.282%
2018-03-04T21:01:55Jocelyn Larouchelow 4M197027912000000012---0.801--7.025%
2018-09-18T11:52:41Jocelyn Larouchelow 4M197027919702790012---1.201--7.561%
2018-11-26T12:53:55Jocelyn LaroucheManual testing197027924628487512---1.457--7.804%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-09T21:14:41masserManual testing14000004900000027--0.367


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-27T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:01Mark RoseManual testing258260--0.058--
2010-01-01T13:28:00S485122USB-W260261--0.078--
2016-02-23T16:29:01Mark RoseManual testing261262--0.156--
2011-08-27T22:19:00GrunwalderGIMPManual testing21263--0.810--
2016-02-23T16:29:01Mark RoseManual testing262263--0.498--
2015-03-22T23:34:00lycornManual testing263264--0.996--
2015-03-22T23:35:00lycornManual testing264265--1.896--
2015-09-09T11:47:00ramgeisManual testing265266--3.793--
2018-05-28T14:40:32TJAOIManual testing266267--7.585--
2019-05-18T04:32:08chuenkitManual testing267268--15.17--
2022-03-07T07:02:25tim svoyager1268269--30.34--


ECM factoring results:

Old Calculation Method

Total ECM effort:22.025 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:22.025 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
20110009.7950.006%
25500000.91140.213%
302500000.05894.400%
3510000000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
50000500000019416.38
50000675000070.674
500007500000494.971


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-17T00:00:00ANONYMOUSv4_computersD4B29FEED7618F1D0.130
2015-07-12T18:10:00MadPooManual testingD4B29FEED7618F1D0.130


PRP results:
No PRP results for M1970279


P-1 factor-bounds graph:
B1 = 1970279, B2 = 246284875 (P-1 stage 2)
B1 = 1970279, B2 = 197027900 (P-1 stage 2)
B1 = 1970279, B2 = 120000000 (P-1 stage 2)
B1 = 1970279, B2 = 60000000 (P-1 stage 2)
B1 = 1970279, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1970279 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-09T21:14:41+00:00