is 2 1795733 - 1
has 540570 decimal digits
takes 0.097 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4CAB2429B061B3C4double-checked
PRPE0C01C4AB7CEE40Bverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26833.192569.1176%17957331975306300.98018.0657%34.172671.6085%2.4909%
PrimeNet2570.010763.1579%80001400000.00122.8162%0.011964.1954%1.0375%
GPU722610.171165.5738%80001300000.00121.4944%0.172266.0882%0.5145%
Difference+7+33.0214+3.5439%+1787733+197400630+0.9790+6.5714%+34.0004+5.5203%+5.5203%

Known prime factors (1 factor, 79.2 bits, 0.00440966% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17957336875281791957179014708792479.186191433854363571283
137 × 521 × 2682010372579
2022-08-05521268201037257982,98211,49421,468

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-08T16:00:00Carsten Kossendeyleela950001638750---0.014--2.168%
2014-04-28T23:56:00ANONYMOUSManual testing145000145000---0.011--0.959%
2014-10-10T20:28:00Jocelyn LaroucheManual testing180743180743---0.014--1.081%
2015-01-13T02:42:00Jocelyn LaroucheManual testing271114271114---0.021--1.331%
2015-02-15T21:12:00Jocelyn LaroucheManual testing360851360851---0.028--1.526%
2015-02-21T13:42:00Jocelyn LaroucheManual testing396936396936---0.031--1.595%
2015-03-08T04:50:00Jocelyn LaroucheManual testing436629436629---0.034--1.665%
2015-03-15T18:55:00Jocelyn LaroucheManual testing480291480291---0.038--1.737%
2015-04-08T16:59:00Jocelyn LaroucheManual testing581152581152---0.046--1.887%
2015-05-01T17:20:00Jocelyn LaroucheManual testing703193703193---0.055--2.044%
2015-05-07T16:19:00Jocelyn LaroucheManual testing773512773512---0.061--2.126%
2015-05-22T00:28:00Jocelyn LaroucheManual testing850863850863---0.067--2.209%
2015-05-26T18:17:00Jocelyn LaroucheManual testing935949935949---0.074--2.294%
2015-06-08T13:43:00Jocelyn LaroucheManual testing10295431029543---0.081--2.380%
2015-06-25T21:15:00Jocelyn LaroucheManual testing11324971132497---0.089--2.469%
2015-07-07T18:13:00Jocelyn LaroucheManual testing12457461245746---0.098--2.559%
2015-07-21T01:20:00Jocelyn LaroucheManual testing13703201370320---0.108--2.651%
2015-07-21T05:51:00mikrMSI3642200123456789---0.800--7.994%
2018-10-01T11:53:53Jocelyn Larouchelow 4M179573312570131012---0.672--7.555%
2018-10-02T11:45:33Jocelyn Larouchelow 4M179573314365864012---0.749--7.705%
2018-10-07T10:38:41Jocelyn Larouchelow 4M179573317957330012---0.903--7.958%
2018-10-19T23:20:59Jocelyn Larouchelow 4M179573319753063012---0.980--8.066%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-05T12:38:21masserManual testing16000005760000012771P+12479.1860.427


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.021--
2016-02-23T16:28:52Mark RoseManual testing258260--0.064--
2010-04-19T13:16:00Architects Cubeda3_bu2260261--0.086--
2016-02-23T16:28:52Mark RoseManual testing261262--0.171--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.889--
2016-02-23T16:28:52Mark RoseManual testing262263--0.547--
2015-05-03T06:24:00snme2pm1Manual testing263264--1.093--
2015-05-03T06:24:00snme2pm1Manual testing264265--2.081--
2015-09-13T19:11:00ramgeisManual testing265266--4.161--
2017-07-14T09:26:30TJAOIManual testing266267--8.323--
2019-06-17T12:15:01TJAOIManual testing267268--16.65--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.782 GHz-days
Estimated T-Level:24.607
DigitsB1CurvesCompleteFacMiss
2011000258 / 1002.5807.480%
2550000258 / 2800.92139.729%

New Calculation Method

Total ECM effort:17.782 GHz-days
Estimated T-Level:24.607
DigitsB1CompleteFacMiss
20110009.9230.005%
25500000.91839.926%
302500000.05894.373%
3510000000.00399.730%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025817.78


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00ANONYMOUSv4_computers4CAB2429B061B3C40.097
2015-07-18T18:31:00MadPooManual testing4CAB2429B061B3C40.097


PRP results:
dateuseridcompidcofactorsres64PRP
2022-08-06T00:50:03Wentao HuangBiolake
687528179195717901470879
E0C01C4AB7CEE40Bno


P-1 factor-bounds graph:
B1 = 1795733, B2 = 197530630 (P-1 stage 2)
B1 = 1795733, B2 = 179573300 (P-1 stage 2)
B1 = 3642200, B2 = 123456789 (P-1 stage 2)
B1 = 1795733, B2 = 143658640 (P-1 stage 2)
B1 = 1795733, B2 = 125701310 (P-1 stage 2)
B1 = 1600000, B2 = 57600000 (P+1 stage 2)
B1 = 3642200 (P-1 stage 1)
B1 = 1795733 (P-1 stage 1)
B1 = 1600000 (P+1 stage 1)
B1 = 1370320 (P-1 stage 1)
B1 = 1245746 (P-1 stage 1)
B1 = 1132497 (P-1 stage 1)
B1 = 1029543 (P-1 stage 1)
B1 = 935949 (P-1 stage 1)
B1 = 850863 (P-1 stage 1)
B1 = 773512 (P-1 stage 1)
B1 = 703193 (P-1 stage 1)
B1 = 581152 (P-1 stage 1)
B1 = 480291 (P-1 stage 1)
B1 = 436629 (P-1 stage 1)
B1 = 396936 (P-1 stage 1)
B1 = 360851 (P-1 stage 1)
B1 = 271114 (P-1 stage 1)
B1 = 180743 (P-1 stage 1)
B1 = 95000, B2 = 1638750 (P-1 stage 2)
B1 = 145000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-08-06T00:50:03+00:00