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Riesel primes of the form 947•2ⁿ-1

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Reserved! This sequence is currently part of Multi Reservation 3: NPLB Drive 18.

Current data

`k` , `b` :	947 , 2
Type :	Low
Count :	13
Nash :	906
Max `n` :	2,200,000
Date :	2024-07-30
Reserved :	No Prime Left BehindNo Prime Left Behind/Reserved

6, 24, 36, 408, 474, 1788, 1816, 5704, 13932, 217242, 425076, 470602, 1012854

History

2023-01-21: Reserved by NPLB Drive 18, for 2000000<n<3000000
2023-01-21: Checked to n = 2000000, NPLB Drive 14, released
2012-02-19: Found n = 1012854, Lennart Vogel
2011-12-31: Reserved by NPLB Drive 14, for 1000000<n<=2000000
2011-07-11: Checked to n = 1000000, NPLB Drive 7, released
2008-12-22: Checked to n = 600000, NPLB Drive 1, released
2008-12-19: Reserved by NPLB Drive 7, for 600000<n<=1000000
2008-06-06: Found n = 470602, James P. Burt
2008-05-15: Found n = 425076, Timothy Sorbera
2008-03-25: Checked to n = 333200, NPLB Drive 2, released
2008-01-22: Reserved by NPLB Drive 2, for 260000<=n<=333200
2008-01-21: Reserved by NPLB Drive 1, for 333201<=n<=600000
2005-02-05: Found n = 217242, Peter Benson

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