is 2 2432737 - 1
has 732327 decimal digits
takes 0.164 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7B1FF1944205A66Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.501267.6471%1986400695240000.55507.1748%25.056269.9683%2.3213%
PrimeNet2590.031662.7119%100001800000.00192.5249%0.033563.6534%0.9415%
GPU722630.656165.0794%100001500000.00171.3057%0.657865.5353%0.4560%
Difference+5+23.8451+2.5677%+1976400+69374000+0.5533+5.8691%+24.3984+4.4330%+4.4330%

Known prime factors (1 factor, 78.4 bits, 0.00322222% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24327373955629008272143576127192478.38881299972176855607
7 × 379 × 30644542848419
2020-05-153793064454284841949,603163,547305,459

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.233%
2003-10-31T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.770%
2010-11-17T11:34:00Jocelyn LaroucheManual testing2000020000---0.002--0.262%
2011-01-09T11:01:00Oscar Östlin7501175011---0.007--0.686%
2011-01-24T07:35:00Oscar Östlin950001923750---0.019--2.364%
2014-04-28T08:21:00mikrMSI198640069524000---0.555--7.175%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00ANONYMOUSv4_computers21259--0.032--
2016-02-23T16:29:14Mark RoseManual testing259260--0.032--
2009-01-16T06:18:00Sturle Sundedanzi.ifi260261--0.063--
2012-06-05T16:42:00Sebastian HornbostelManual testing261262--0.126--
2013-12-04T21:13:00Jerry HallettManual testing262263--0.404--
2015-02-27T20:40:00VictordeHollanderManual testing263264--0.807--
2015-02-27T20:40:00VictordeHollanderManual testing264265--1.536--
2015-10-25T20:34:59ramgeisManual testing265266--3.072--
2017-07-08T12:01:24Gordon SpenceManual testing266267--6.143--
2019-07-01T11:11:01TJAOIManual testing267268--12.29--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.835 GHz-days
Estimated T-Level:2.150
DigitsB1CurvesCompleteFacMiss
201100043 / 1000.43064.910%
255000043 / 2800.15485.740%

New Calculation Method

Total ECM effort:3.835 GHz-days
Estimated T-Level:2.150
DigitsB1CompleteFacMiss
20110001.38724.980%
25500000.12588.218%
302500000.00899.231%


ECM Summary

B1B2factorcurvesGHz-days
500005000000423.746
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-23T00:00:00ANONYMOUSv4_computers7B1FF1944205A66F0.164
2018-05-22T12:12:53kkmrkkblmbrbkold7B1FF1944205A66F0.164


PRP results:
dateuseridcompidcofactorsres64PRP
2020-05-15T10:59:27CrypticCluecruncher
395562900827214357612719
92E05B555A8D9529no
2020-05-15T16:16:43mnd9f4th
395562900827214357612719
92E05B555A8D9529no
2020-05-16T16:54:13marssystemssystem11
395562900827214357612719
92E05B555A8D9529no


P-1 factor-bounds graph:
B1 = 1986400, B2 = 69524000 (P-1 stage 2)
B1 = 1986400 (P-1 stage 1)
B1 = 95000, B2 = 1923750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (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: 2020-05-16T16:54:13+00:00