is 2 3050693 - 1
has 918351 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-L7A267C7858B7604Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26939.134368.1159%30506936676916404.84549.6667%43.979771.1981%3.0821%
PrimeNet2600.050363.3333%120002200000.00292.5229%0.053264.2584%0.9251%
GPU722641.166765.6250%140002200000.00311.4650%1.169866.1286%0.5036%
Difference+5+37.9676+2.4909%+3036693+667471640+4.8423+8.2017%+42.8099+5.0695%+5.0695%

Known prime factors (1 factor, 101.3 bits, 0.00332198% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3050693321651901537650773674194480057731101.343527178417391803720784416
25 × 3 × 72 × 109 × 349 × 853 × 1710629 × 2018987
2017-09-26171062920189874.744e+100.21320.4296

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.201%
2010-10-04T16:13:00markrtiny1100002447500---0.029--2.369%
2016-03-16T02:33:05Squeeky_SquirrelP4_2600205000568875012---0.062--3.207%
2017-09-26T23:42:50mikrMSI3000000300000031101.3430.3700.5190.7403.360%
2021-11-20T13:50:21Jocelyn LaroucheManual testing30506933050693-
skipped known factor: 3216519015376507736741944800577
--0.376--3.378%
2021-12-08T12:48:15Jocelyn LaroucheManual testing30506933050693012-
skipped known factor: 3216519015376507736741944800577
--0.561--6.024%
2021-12-21T15:51:57Jocelyn LaroucheManual testing3050693139258350-
skipped known factor: 3216519015376507736741944800577
--1.292--7.807%
2021-12-22T09:19:37Jocelyn LaroucheManual testing3050693667691640-
skipped known factor: 3216519015376507736741944800577
--4.845--9.667%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-03T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-12T22:25:00Sturle Sundegouffy.ifi260261--0.050--
2011-03-18T17:50:00Sid & 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--1.225--
2015-06-06T19:31:00ThaManual testing265266--2.450--
2021-01-16T21:12:25Jocelyn LaroucheManual testing265266--2.450--
2021-02-18T11:47:34Jocelyn LaroucheManual testing266267--4.899--
2017-05-07T02:13:05Gordon SpenceManual testing266267--4.899--
2021-02-25T22:13:20Jocelyn LaroucheManual testing267268--9.80--
2022-01-09T11:52:12Jocelyn LaroucheManual testing268269--19.60--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.747 GHz-days
Estimated T-Level:0.750
DigitsB1CurvesCompleteFacMiss
201100015 / 1000.15086.006%
255000015 / 2800.05494.775%

New Calculation Method

Total ECM effort:1.747 GHz-days
Estimated T-Level:0.750
DigitsB1CompleteFacMiss
20110000.48461.639%
25500000.04495.721%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.747


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computers7A267C7858B7604E0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-28T13:10:15alpertronManual testing
3216519015376507736741944800577
FBFD71B05253CA__no
2017-11-17T14:23:34Oliver KruseThreadripper
3216519015376507736741944800577
FBFD71B05253CA__no


P-1 factor-bounds graph:
B1 = 3050693, B2 = 667691640 (P-1 stage 2)
B1 = 3050693, B2 = 139258350 (P-1 stage 2)
B1 = 3050693, B2 = 30506930 (P-1 stage 2)
B1 = 3050693 (P-1 stage 1)
B1 = 3000000 (P-1 stage 1)
B1 = 205000, B2 = 5688750 (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 = 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: 2022-01-09T11:52:12+00:00