is 2 20005649 - 1
has 6022301 decimal digits
takes 12.948 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L55A92963EC585520double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual274191.239366.2162%24000050400000.47072.4134%191.709967.0316%0.8153%
PrimeNet2650.364761.5385%9000032000000.24354.9971%0.608263.4604%1.9220%
GPU722695.967763.7681%14000040000000.32883.6276%6.296465.0825%1.3144%
Difference+5+185.2716+2.4481%+100000+1040000+0.1419-1.2142%+185.4135+1.9491%+1.9491%

Known prime factors (1 factor, 93.4 bits, 0.00046695% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20005649132078748773295867619078421612993.415330103634161770676920
23 × 3 × 5 × 19 × 911 × 1193 × 13441 × 9911173
2022-01-17134419911173134,126,1910.51870.9465

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
unknown2400005040000---0.471--2.413%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-01-17T15:47:02ATHec2-P_110000002700000027P-12993.4152.729


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-07-27T00:00:00ANONYMOUSv4_computers21266--0.738--
2011-07-13T06:48:00XyzzyManual testing266267--0.747--
2016-01-21T18:50:42mikrManual testing267268--1.494--
2016-01-21T18:50:42mikrManual testing268269--2.988--
2017-03-14T13:42:24ramgeisManual testing269270--5.977--
2019-01-14T07:09:57slaurManual testing270271--11.95--
2021-05-22T21:07:45-Anonymous-Manual testing271272--23.91--
2021-05-22T21:07:45-Anonymous-Manual testing272273--47.81--
2021-05-25T10:53:49-Anonymous-Manual testing273274--95.62--


ECM factoring results:
No ECM results for M20005649


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2007-10-29T00:00:00Team Prime Ribv4_computers55A92963EC58552012.95


PRP results:
No PRP results for M20005649


P-1 factor-bounds graph:
B1 = 1000000, B2 = 27000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 240000, B2 = 5040000 (P-1 stage 2)
B1 = 240000 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2022-01-17T15:47:02+00:00