is 2 3072107 - 1
has 924797 decimal digits
takes 0.261 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L8A4198179D30959Fdouble-checked
PRP3D3640DE21905475verified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.402067.6471%30000001000000001.02248.0407%20.424470.2485%2.6014%
PrimeNet2600.050063.3333%120002200000.00292.5262%0.052964.2596%0.9263%
GPU722641.158665.6250%140002200000.00311.4670%1.161766.1293%0.5043%
Difference+4+18.2434+2.0221%+2986000+99780000+1.0193+6.5737%+19.2627+4.1192%+4.1192%

Known prime factors (1 factor, 83.6 bits, 0.00272216% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3072107149418986213063720621174232683.6282431864941765760773
33 × 31 × 2905453932814529
2020-12-253129054539328145291,238,45219,535,62736,487,110

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-23T00:00:00markrv4_computers15000217500---0.003--0.808%
2004-02-14T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.249%
2010-09-21T15:52:00markrtiny1100002447500---0.029--2.668%
2016-03-07T21:28:45Squeeky_SquirrelP4_2600205000599625012---0.064--3.615%
2018-01-24T18:31:42mikrMSI300000010000000012---1.022--8.041%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-23T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T02:12:00Sturle Sundegoomba.ifi260261--0.050--
2011-10-25T22:56:00Sid & AndyBuzz261262--0.100--
2013-01-07T13:56:00dbaughManual testing262263--0.320--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.639--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.216--
2015-06-06T19:31:00ThaManual testing265266--2.432--
2017-05-14T00:43:38Gordon SpenceManual testing266267--4.865--
2018-08-05T23:31:44ramgeisManual testing267268--9.73--


ECM factoring results:

Old Calculation Method

Total ECM effort:4.198 GHz-days
Estimated T-Level:1.800
DigitsB1CurvesCompleteFacMiss
201100036 / 1000.36069.641%
255000036 / 2800.12987.915%

New Calculation Method

Total ECM effort:4.198 GHz-days
Estimated T-Level:1.800
DigitsB1CompleteFacMiss
20110001.16131.308%
25500000.10590.036%
302500000.00699.356%


ECM Summary

B1B2factorcurvesGHz-days
500005000000293.382
50000500000070.816


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-06-26T00:00:00ANONYMOUSv4_computers8A4198179D30959F0.261
2000-03-28T00:00:00ANONYMOUSv4_computers8A4198179D30959F0.261
2000-05-24T00:00:00ANONYMOUSv4_computers8A4198179D30959F0.261


PRP results:
dateuseridcompidcofactorsres64PRP
2020-12-26T16:30:42Niels_Mache_Nextcloudconf4-a
14941898621306372062117423
3D3640DE21905475no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 205000, B2 = 5996250 (P-1 stage 2)
B1 = 110000, B2 = 2447500 (P-1 stage 2)
B1 = 205000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
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: 2020-12-26T16:30:42+00:00