is 2 1970233 - 1
has 593100 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-LEB33C3166A8F8EBFdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26960.595369.5652%19702332462791251.45687.8040%62.052171.9403%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+60.2834+3.4362%+1962233+246179125+1.4556+6.6081%+61.7390+5.4062%+5.4062%

Known prime factors:
No known factors for M1970233

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-03-29T09:04:00kurlyhex100000030000000---0.246--5.204%
2018-01-20T12:51:30Jocelyn Larouchelow 4M19702333000000012---0.333--5.550%
2018-02-14T12:53:58Jocelyn Larouchelow 4M19702336000000012---0.489--6.282%
2018-03-04T21:01:55Jocelyn Larouchelow 4M197023312000000012---0.801--7.025%
2018-09-18T11:52:41Jocelyn Larouchelow 4M197023319702330012---1.201--7.561%
2018-11-26T12:53:55Jocelyn LaroucheManual testing197023324627912512---1.457--7.804%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-10T00:00:00ANONYMOUSv4_computers21258--0.019--
2016-02-23T16:29:01Mark RoseManual testing258260--0.058--
2010-01-01T14:21:00S485122USB-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--7.586--
2019-05-18T04:32:08chuenkitManual testing267268--15.17--
2022-03-03T06:39:35tim svoyager1268269--30.34--


ECM factoring results:

Old Calculation Method

Total ECM effort:16.970 GHz-days
Estimated T-Level:23.589
DigitsB1CurvesCompleteFacMiss
2011000201 / 1002.01013.264%
2550000201 / 2800.71848.717%

New Calculation Method

Total ECM effort:16.970 GHz-days
Estimated T-Level:23.589
DigitsB1CompleteFacMiss
20110007.7310.044%
25500000.71548.904%
302500000.04595.588%
3510000000.00299.789%


ECM Summary

B1B2factorcurvesGHz-days
50000500000020116.97


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersEB33C3166A8F8EBF0.130
2015-07-10T01:01:00MadPooManual testingEB33C3166A8F8EBF0.130


PRP results:
No PRP results for M1970233


P-1 factor-bounds graph:
B1 = 1970233, B2 = 246279125 (P-1 stage 2)
B1 = 1970233, B2 = 197023300 (P-1 stage 2)
B1 = 1970233, B2 = 120000000 (P-1 stage 2)
B1 = 1970233, B2 = 60000000 (P-1 stage 2)
B1 = 1970233, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1970233 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-03T06:39:35+00:00