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Generalized Cullen primes of the form `n`•10ⁿ+1

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Reserved! This sequence is currently reserved by: Mark Rodenkirch

Current data

Base :	10
Count :	10
Max `n` :	270,026
Date :	2023-04-28
Reserved :	Mark RodenkirchMark Rodenkirch/Reserved

1, 3, 9, 21, 363, 2161, 4839, 49521, 105994, 207777

History

2023-04-28: Reserved by Mark Rodenkirch to n=500000
2023-04-23: Checked n = 2-100000, Mark Rodenkirch, double-checked
?: Checked to n = 270026, (?)
2010-02-14: Found n = 207777, Günter Löh
2000-11-20: Found n = 105994, Günter Löh
1999-08-18: Found n = 49521, Günter Löh
1990-01-01: Found n = 4839, Harvey Dubner
1990-01-01: Found n = 2161, Harvey Dubner

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