is 2 1935757 - 1
has 582721 decimal digits
takes 0.105 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA76A5D6A46B9F7D7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26830.791569.1176%80000003200000001.96659.7466%32.758072.1276%3.0100%
PrimeNet2580.019863.7931%80001400000.00122.4633%0.021064.6850%0.8919%
GPU722620.317466.1290%8000900000.00101.1513%0.318466.5190%0.3900%
Difference+6+30.4741+2.9886%+7992000+319910000+1.9655+8.5954%+32.4396+5.6087%+5.6087%

Known prime factors:
No known factors for M1935757

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-11-20T04:38:00kurlyManual testing100000030000000---0.203--5.691%
2018-01-19T13:04:08Jocelyn Larouchelow 4M19357573000000012---0.273--6.041%
2018-02-04T11:56:59mikrS061800000032000000012---1.966--9.747%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-12-21T00:00:00ari.ornv4_computers21258--0.020--
2016-02-23T16:28:59Mark RoseManual testing258260--0.060--
2010-02-02T05:36:00S485122USB-W260261--0.079--
2016-02-23T16:28:59Mark RoseManual testing261262--0.159--
2011-08-27T22:21:00GrunwalderGIMPManual testing21263--0.824--
2016-02-23T16:28:59Mark RoseManual testing262263--0.507--
2015-05-13T08:02:00lycornManual testing263264--1.014--
2015-05-13T08:02:00lycornManual testing264265--1.930--
2015-09-04T17:59:00ramgeisManual testing265266--3.860--
2018-01-15T16:18:56TJAOIManual testing266267--7.721--
2019-05-10T08:32:10chuenkitManual testing267268--15.44--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.048 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:18.048 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110009.8040.006%
25500000.91040.242%
302500000.05894.407%
3510000000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
50000500000019713.69
50000545000070.504
50000560000070.510
500007500000403.339


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ari.ornv4_computersA76A5D6A46B9F7D70.105
2015-07-12T18:10:00MadPooManual testingA76A5D6A46B9F7D70.105


PRP results:
No PRP results for M1935757


P-1 factor-bounds graph:
B1 = 8000000, B2 = 320000000 (P-1 stage 2)
B1 = 8000000 (P-1 stage 1)
B1 = 1935757, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1935757 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-17T11:24:21+00:00