is 2 2336783 - 1
has 703442 decimal digits
takes 0.158 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB26C1D6B065BB232double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26825.507267.6471%60000001800000001.51648.9716%27.023670.5496%2.9026%
PrimeNet2580.016462.0690%100001900000.00192.9365%0.018463.1828%1.1139%
GPU722620.262964.5161%130002000000.00231.7845%0.265265.1493%0.6332%
Difference+6+25.2443+3.1309%+5987000+179800000+1.5141+7.1871%+26.7584+5.4003%+5.4003%

Known prime factors (1 factor, 70.8 bits, 0.00303068% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
233678320848782540397345841532270.820446100098733972
22 × 33 × 31 × 133243757089
2020-06-2831133243757089146.38711.111,328.2

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.230%
2010-03-03T08:37:00Budannan50000010000000---0.100--4.378%
2018-02-21T07:33:37Sid & AndyHand_In_The_Box600000018000000012---1.516--8.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:12Mark RoseManual testing21260--0.066--
2009-01-10T21:39:00Sturle Sundegiovanni.ifi260261--0.066--
2012-05-27T19:43:00Sebastian HornbostelManual testing261262--0.131--
2013-01-23T08:26:00dbaughManual testing262263--0.420--
2015-03-03T21:35:00VictordeHollanderManual testing263264--0.840--
2015-03-03T21:35:00VictordeHollanderManual testing264265--1.599--
2015-10-25T20:35:18ramgeisManual testing265266--3.198--
2017-06-07T04:04:54Gordon SpenceManual testing266267--6.396--
2019-03-18T11:45:41TJAOIManual testing267268--12.79--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.853 GHz-days
Estimated T-Level:3.300
DigitsB1CurvesCompleteFacMiss
201100066 / 1000.66051.514%
255000066 / 2800.23678.967%

New Calculation Method

Total ECM effort:5.853 GHz-days
Estimated T-Level:3.300
DigitsB1CompleteFacMiss
20110002.12911.895%
25500000.19282.496%
302500000.01298.822%


ECM Summary

B1B2factorcurvesGHz-days
500005000000635.587
50000500000030.266


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersB26C1D6B065BB2320.158


PRP results:
dateuseridcompidcofactorsres64PRP
2020-06-28T11:27:47CrypticClueManual testing
2084878254039734584153
43EC9AFD7E4AB0A3no
2020-06-29T16:31:13oodairacom1
2084878254039734584153
43EC9AFD7E4AB0A3no


P-1 factor-bounds graph:
B1 = 6000000, B2 = 180000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (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: 2020-06-29T16:31:13+00:00