is 2 3047557 - 1
has 917407 decimal digits
takes 0.259 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRPD6A956209CBCB0A6verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26939.174668.1159%32538852185471456416.267612.6544%55.442272.1507%4.0347%
PrimeNet2600.050463.3333%120002200000.00292.5224%0.053364.2582%0.9249%
GPU722641.167965.6250%130002200000.00301.4307%1.170966.1168%0.4918%
Difference+5+38.0067+2.4909%+32525852+1854494564+16.2646+11.2237%+54.2712+6.0339%+6.0339%

Known prime factors (1 factor, 71.5 bits, 0.00234642% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
304755733588328322114501044312271.508551069730969995
5 × 110213946193999
2021-06-205110213946193999253.85741,0541,384,083

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.121%
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.201%
2010-10-03T13:05:00markrtiny1100002420000---0.029--2.363%
2016-03-13T09:52:22Squeeky_SquirrelP4_2600205000568875012---0.062--3.206%
2017-09-14T01:53:31mikrMSI300000010000000012---1.022--7.405%
2021-05-05T16:44:04oodairacom532538852185471456412---16.27--12.654%
2022-02-05T08:19:06Jocelyn LaroucheManual testing1000000119912100---0.923--6.846%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:25Mark RoseManual testing21260--0.050--
2009-02-13T17:53:00Sturle Sundegonsha.ifi260261--0.050--
2010-11-11T03:41:00Sid & AndyBuzz261262--0.101--
2013-01-07T13:54:00dbaughManual testing262263--0.322--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.644--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.226--
2015-06-06T19:31:00ThaManual testing265266--2.452--
2017-05-07T02:13:04Gordon SpenceManual testing266267--4.904--
2022-01-20T22:37:59Jocelyn LaroucheManual testing267268--9.81--
2018-07-24T12:49:47ramgeisManual testing267268--9.81--
2021-03-25T10:40:23TJAOIManual testing268269--19.62--


ECM factoring results:

Old Calculation Method

Total ECM effort:8.277 GHz-days
Estimated T-Level:3.500
DigitsB1CurvesCompleteFacMiss
201100070 / 1000.70049.484%
255000070 / 2800.25077.845%

New Calculation Method

Total ECM effort:8.277 GHz-days
Estimated T-Level:3.500
DigitsB1CompleteFacMiss
20110002.27410.294%
25500000.20681.398%
302500000.01398.740%


ECM Summary

B1B2factorcurvesGHz-days
500005000000576.638
50000500000060.699
50000675000070.941


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-14T06:50:01MadPooManual testing6857CEF12EFC7B__0.259


PRP results:
dateuseridcompidcofactorsres64PRP
2021-06-21T12:09:32kutensrigel
3358832832211450104431
D6A956209CBCB0A6no


P-1 factor-bounds graph:
B1 = 32538852, B2 = 1854714564 (P-1 stage 2)
B1 = 32538852 (P-1 stage 1)
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 119912100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 205000, B2 = 5688750 (P-1 stage 2)
B1 = 110000, B2 = 2420000 (P-1 stage 2)
B1 = 205000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-05T08:19:06+00:00