is 2 3051017 - 1
has 918448 decimal digits
takes 0.260 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD7E0AE933836D62Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.536167.6471%30000001000000001.02248.0353%20.558570.2467%2.5996%
PrimeNet2600.050363.3333%120002200000.00292.5230%0.053264.2584%0.9251%
GPU722641.166665.6250%140002200000.00311.4650%1.169766.1286%0.5036%
Difference+4+18.3695+2.0221%+2986000+99780000+1.0193+6.5702%+19.3888+4.1181%+4.1181%

Known prime factors (1 factor, 79.4 bits, 0.00260387% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
30510178225090682263736149013132479.444134792606567969568
25 × 32 × 468029883916561
2020-10-143246802988391656175,4633,146,9295,877,587

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.249%
2010-10-04T18:48:00markrtiny1100002447500---0.029--2.665%
2016-03-16T08:53:45Squeeky_SquirrelP4_2600205000568875012---0.062--3.572%
2017-09-28T15:39:03mikrMSI300000010000000012---1.022--8.035%
2021-01-14T13:16:35Jocelyn LaroucheManual testing305101305101---0.038--1.535%
2021-01-16T17:21:45Jocelyn LaroucheManual testing30510130510176---0.056--3.287%
2022-01-23T08:35:01Jocelyn LaroucheManual testing1055100119912100---0.929--7.513%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-03T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T00:47:00Sturle Sundegouffy.ifi260261--0.050--
2011-03-19T06:27:00Sid & AndyBuzz261262--0.101--
2013-01-07T13:54:00dbaughManual testing262263--0.322--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.643--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.225--
2015-06-06T19:31:00ThaManual testing265266--2.449--
2017-05-07T02:13:05Gordon SpenceManual testing266267--4.899--
2018-07-25T22:30:18ramgeisManual testing267268--9.80--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.980 GHz-days
Estimated T-Level:0.850
DigitsB1CurvesCompleteFacMiss
201100017 / 1000.17084.294%
255000017 / 2800.06194.099%

New Calculation Method

Total ECM effort:1.980 GHz-days
Estimated T-Level:0.850
DigitsB1CompleteFacMiss
20110000.54857.788%
25500000.05095.165%
302500000.00399.695%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.747
50000500000020.233


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-02-08T00:00:00ANONYMOUSv4_computersDFF600CD8C6D23__0.260
1999-10-15T00:00:00ANONYMOUSv4_computersD7E0AE933836D62E0.260
1999-12-30T00:00:00ANONYMOUSv4_computersD7E0AE933836D62E0.260
2000-10-15T00:00:00ANONYMOUSv4_computersD7E0AE933836D62E0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2020-10-15T07:24:50tottenhoff3-of-4-Ryzen-5-3600
822509068226373614901313
9C1306D8BE3465__no
2020-10-16T04:33:45kutensvega
822509068226373614901313
9C1306D8BE3465D0no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1055100, B2 = 119912100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1055100 (P-1 stage 1)
B1 = 205000, B2 = 5688750 (P-1 stage 2)
B1 = 305101, B2 = 3051017 (P-1 stage 2)
B1 = 305101 (P-1 stage 1)
B1 = 110000, B2 = 2447500 (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 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-01-23T08:35:01+00:00