is 2 2386283 - 1
has 718343 decimal digits
takes 0.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD86AE9F2897635C3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.978167.6471%30000001000000000.81157.8424%25.789770.1843%2.5372%
PrimeNet2590.032262.7119%100001700000.00182.4770%0.034063.6355%0.9236%
GPU722630.668865.0794%100001400000.00171.2733%0.670565.5240%0.4447%
Difference+5+24.3093+2.5677%+2990000+99860000+0.8099+6.5690%+25.1192+4.6603%+4.6603%

Known prime factors (1 factor, 77.3 bits, 0.00323934% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23862831860360826577655665204872477.30038980305910440121
29 × 409 × 3286426600661
2020-07-24409328642660066118,16017,53932,759

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.232%
2010-11-08T11:36:00Jocelyn LaroucheManual testing1500015000---0.001--0.203%
2010-11-15T22:51:00Jocelyn LaroucheManual testing2000020000---0.002--0.261%
2010-12-26T08:39:00markrtiny1000002075000---0.020--2.425%
2014-09-15T22:12:00ANONYMOUSManual testing126897126897---0.012--0.936%
2015-11-04T09:58:15mikrMSI300000010000000012---0.812--7.842%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00curtiscv4_computers21259--0.032--
2016-02-23T16:29:13Mark RoseManual testing259260--0.032--
2009-01-14T17:28:00Sturle Sundegoscha.ifi260261--0.064--
2012-06-01T13:43:00Sebastian HornbostelManual testing261262--0.129--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.411--
2015-03-09T12:36:00VictordeHollanderManual testing263264--0.823--
2015-03-09T12:36:00VictordeHollanderManual testing264265--1.566--
2015-11-01T21:51:05ramgeisManual testing265266--3.132--
2017-06-23T15:59:15Gordon SpenceManual testing266267--6.263--
2019-03-18T11:45:39TJAOIManual testing267268--12.53--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.404 GHz-days
Estimated T-Level:3.600
DigitsB1CurvesCompleteFacMiss
201100072 / 1000.72048.499%
255000072 / 2800.25777.290%

New Calculation Method

Total ECM effort:6.404 GHz-days
Estimated T-Level:3.600
DigitsB1CompleteFacMiss
20110002.3239.802%
25500000.21081.066%
302500000.01398.716%


ECM Summary

B1B2factorcurvesGHz-days
500005000000696.137
50000500000030.267


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00curtiscv4_computersD86AE9F2897635C30.161
2018-05-16T01:19:01kkmrkkblmbrbkoldD86AE9F2897635C30.161


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-24T21:15:31mrh.orgw
186036082657765566520487
10A3BFD2EF6CA821no
2020-07-25T19:49:12pew10980xe_1
186036082657765566520487
10A3BFD2EF6CA821no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 100000, B2 = 2075000 (P-1 stage 2)
B1 = 126897 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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: 2020-07-25T19:49:12+00:00