Difference between revisions of "Proth prime 2 121"

Latest revision as of 20:57, 13 September 2024

8, 12^[1], 44, 84, 96^[2], 228, 264, 320, 732, 788, 1808, 7928, 12264, 37784, 59196, 91112, 112208^[3], 168716, 251184, 264632, 272052, 513020, 636564, 674360, 9584444

Remarks :

The sequence A032410 in OEIS.
For all n-values 121•2ⁿ+1 is a Generalized Fermat number.
PrimeGrid Proth Prime Search is double-checking n>5000000.

2021-04-08: Checked to n = 10000000, PrimeGrid 27121 Prime Search
2020-11-20: Found n = 9584444, James Winskill, PrimeGrid 27121 Prime Search (Official announcement)
2019-07: Checked n = 3322000 - 3640000, PrimeGrid Proth Mega Prime Search
2007-04-29: Found n = 636564, Joseph Bohanon
2007-04-25: Found n = 674360, Joseph Bohanon
2007-04-25: Found n = 513020, Joseph Bohanon
2005-02-21: Found n = 272052, Jim Fougeron
2005-02-18: Found n = 264632, Jim Fougeron
2002-09-17: Found n = 251184, Tadashi Taura
2002-07-21: Found n = 168716, Tadashi Taura
1999-12-10: Found n = 112208, Fumitaka Yura
1999-09-07: Found n = 91112, Michael Ian Hartley
1998-06-09: Found n = 59196, Wilfrid Keller
1998-06-06: Found n = 37784, Wilfrid Keller
1992: Found n = 7928, Harvey Dubner

@@ Line 34: / Line 34: @@
 ;80213
 9584444;131410
-|PRemarks=All values are [[Generalized Fermat number]]s.
+|PRemarks=The {{OEIS|l|A032410}}.<br>For all {{Vn}}-values {{Kbn|+|121|2|n}} is a [[Generalized Fermat number]].<br>[[PrimeGrid Proth Prime Search]] is double-checking {{Vn}}>5000000.
 |PSieve=
 }}
@@ Line 40: / Line 40: @@
 {{HistC|2021-04-08|10000000|PrimeGrid 27121 Prime Search|P#9612#149921}}
 {{HistF|2020-11-20|9584444|James Winskill,PrimeGrid 27121 Prime Search}} ([https://www.primegrid.com/download/27121-9584444.pdf Official announcement])
+{{HistC|2019-07|3322000-3640000|PrimeGrid Proth Mega Prime Search}}
 {{HistF|2007-04-29|636564|Joseph Bohanon}}
 {{HistF|2007-04-25|674360|Joseph Bohanon}}