is 2 56530273 - 1
has 17017308 decimal digits
takes 119.813 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-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27216.917263.8889%----16.917263.8889%
Target27333.837564.3836%40000010400000018.57574.0642%52.413265.8311%
Difference-1-16.9203-0.4947%-400000-104000000-18.5757-4.0642%-35.4960-1.9422%

Known prime factors (6 factors, 276.3 bits, 0.00048872% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
56530273339181639928.3373
3
-136.330e-133.408e-66.254e-6
565302731577194616711237.1991395
32 × 5 × 31
2008-09-109314.217e-103.134e-55.629e-5
565302731075355032380731546.612951132
22 × 3 × 7 × 132 × 67
2008-09-301691693.106e-70.00050.0011
565302733002801045139591548.0932655923
47 × 56509
2008-09-3047565091.244e-60.00960.0177
5653027318052965294659211650.68115967520
25 × 5 × 23 × 4339
2014-06-053243393.113e-60.00080.0014
56530273470725825237170578472065.352416348445051
32 × 7 × 11 × 172 × 127 × 16369
2018-10-04289163690.13570.00360.0051

57 Composite Factors:
P-1 results:
No P-1 results for M56530273


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-09-10Will EdgingtonManual testing??37.199129.77968e-11276.82.25939e-10
2008-09-30markrManual testing??46.612151.44724e-7276.83.34354e-7
2008-09-30markrManual testing??48.093155.80476e-7276.81.34107e-6
2014-06-05TJAOIManual testing??50.681164.59442e-7276.81.06144e-6
2018-10-04TJAOIManual testing265266*65.352200.007276.50.015
2021-08-06Seth_TrManual testing265266
skipped known factors(?)
--0.132--
2019-06-17Seth_TrManual testing266267--0.264--
2019-06-18Seth_TrManual testing267268--0.529--
2019-12-19Seth_TrManual testing268269--1.058--
2023-04-18LordJuliusManual testing269270--2.115--
2023-04-18LordJuliusManual testing270271--4.230--
2023-04-18LordJuliusManual testing271272--8.460--


ECM factoring results:
No ECM results for M56530273


Lucas-Lehmer results:
No L-L results for M56530273


PRP results:
No PRP results for M56530273


P-1 factor-bounds graph:
100
101
102
103
100
101
102
103
104
105
TF factor-bounds graph:
272
271
270
269
268
267
266
2
this exponent TF target: 73
TF double-checked to: 67.8
250
260
270
280
Last modified: 2023-06-05T21:50:05+00:00