is 2 6390749 - 1
has 1923808 decimal digits
takes 1.133 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LA128F4081458ACD3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272149.643468.0556%2500000500285101.30795.4380%150.951369.7927%1.7371%
PrimeNet2620.096162.9032%280006000000.01523.4149%0.111364.1700%1.2668%
GPU722662.310965.1515%4500010000000.02492.5720%2.335866.0478%0.8963%
Difference+6+147.3325+2.9040%+2455000+49028510+1.2829+2.8659%+148.6155+3.7449%+0.8408%

Known prime factors (1 factor, 124.5 bits, 0.00194849% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
63907493056274005945411171197743557138658468138124.5232391170429276295447683631102660
22 × 32 × 5 × 11 × 13 × 157 × 4159 × 9091 × 11863 × 31751 × 41547971
2022-10-1631751415479712.439e+100.58941.0864

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-02-04T00:00:00ANONYMOUSv4_computers30000285000---0.011--0.706%
2014-10-21T09:52:00Nesowanewfs3900009847500---0.233--3.204%
2022-10-16T11:30:39takahashivaio25000005002851038124.5231.3082.2652.6165.438%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-06-20T00:00:00ANONYMOUSv4_computers21261--0.048--
1998-06-28T00:00:00ANONYMOUSv4_computers21262--0.096--
2016-02-23T16:39:24Mark RoseManual testing262263--0.154--
2014-08-17T11:19:00NesowaManual testing263264--0.307--
2014-08-18T19:55:00lycornManual testing264265--0.585--
2015-10-22T22:35:41snme2pm1Manual testing265266--1.169--
2016-04-13T16:59:14Gordon SpenceManual testing266267--2.339--
2018-06-04T09:45:28ramgeisManual testing267268--4.677--
2020-05-07T13:44:57takahashiManual testing268269--9.354--
2021-02-16T23:13:26takahashiManual testing269270--18.71--
2022-01-04T20:15:41mikrManual testing270271--37.42--
2022-08-18T21:17:23takahashiManual testing271272--74.84--


ECM factoring results:
Total ECM effort:1.617 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.617


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computersA128F4081458ACD31.133
2001-11-03T00:00:00ANONYMOUSv4_computersA128F4081458ACD31.133


PRP results:
dateuseridcompidcofactorsres64PRP
2022-10-23T08:27:13junkman2usaNode1
30562740059454111711977435571386584681
67004DB334D300__no
2022-10-25T04:10:36firejugglerMaison
30562740059454111711977435571386584681
67004DB334D300D4no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 50028510 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 390000, B2 = 9847500 (P-1 stage 2)
B1 = 390000 (P-1 stage 1)
B1 = 30000, B2 = 285000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
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108
TF factor-bounds graph:
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Last modified: 2022-10-25T04:10:36+00:00