is 2 3051599 - 1
has 918623 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-L-unknown--unknown-
PRP2B01C4FDDA59C94Fverified PRP

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26939.122768.1159%32516003185341217116.256112.6542%55.378872.1506%4.0347%
PrimeNet2600.050363.3333%120002200000.00292.5230%0.053264.2584%0.9251%
GPU722641.166465.6250%140002200000.00311.4651%1.169566.1286%0.5036%
Difference+5+37.9563+2.4909%+32502003+1853192171+16.2530+11.1892%+54.2093+6.0220%+6.0220%

Known prime factors (1 factor, 72.5 bits, 0.00237690% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
305159968347609940442103931212272.5331119865518707440
24 × 5 × 58369 × 239824547
2021-05-1858369239824547426.011.61933.0118

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.201%
2010-10-05T00:44:00markrtiny1100002447500---0.029--2.369%
2016-03-16T23:41:58Squeeky_SquirrelP4_2600205000568875012---0.062--3.207%
2017-10-01T11:05:41mikrMSI300000010000000012---1.022--7.406%
2021-08-10T07:57:32oodairacom5325160031853412171122272.53316.260.51932.5112.654%
2022-02-05T08:19:17Jocelyn LaroucheManual testing1000000119912100---0.923--6.847%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-06-03T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T05:42:00Sturle Sundegouffy.ifi260261--0.050--
2011-03-20T09:17:00Sid & 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--1.224--
2015-06-06T19:31:00ThaManual testing265266--2.449--
2017-05-07T02:13:05Gordon SpenceManual testing266267--4.898--
2022-01-20T22:38:00Jocelyn LaroucheManual testing267268--9.80--
2018-07-25T22:30:19ramgeisManual testing267268--9.80--
2021-03-25T10:40:15TJAOIManual testing268269--19.59--


ECM factoring results:

Old Calculation Method

Total ECM effort:6.998 GHz-days
Estimated T-Level:2.950
DigitsB1CurvesCompleteFacMiss
201100059 / 1000.59055.268%
255000059 / 2800.21180.970%

New Calculation Method

Total ECM effort:6.998 GHz-days
Estimated T-Level:2.950
DigitsB1CompleteFacMiss
20110001.91914.678%
25500000.17484.050%
302500000.01198.935%


ECM Summary

B1B2factorcurvesGHz-days
500005000000505.824
50000500000020.233
50000675000070.941


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-30T00:00:00ANONYMOUSv4_computers60CEF572A07B00__0.260


PRP results:
dateuseridcompidcofactorsres64PRP
2021-05-18T18:28:23RichD0Linux-7
6834760994044210393121
2B01C4FDDA59C94Fno


P-1 factor-bounds graph:
B1 = 32516003, B2 = 1853412171 (P-1 stage 2)
B1 = 32516003 (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 = 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: 2022-02-05T08:19:17+00:00