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A169984 Primes in carryless arithmetic mod 10 in which all digits except the rightmost are zero or five. 5
51, 52, 53, 54, 56, 57, 58, 59, 551, 553, 557, 559, 5051, 5053, 5057, 5059, 5501, 5503, 5507, 5509, 50051, 50053, 50057, 50059, 55001, 55003, 55007, 55009, 55551, 55553, 55557, 55559, 500501, 500503, 500507, 500509, 505001, 505003 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These are called f-type primes.

LINKS

Table of n, a(n) for n=1..38.

Index entries for sequences related to carryless arithmetic

CROSSREFS

A169887 = A163396 union A169984.

Sequence in context: A210086 A031959 A144162 * A042299 A321962 A060033

Adjacent sequences:  A169981 A169982 A169983 * A169985 A169986 A169987

KEYWORD

nonn,base

AUTHOR

David Applegate, Marc LeBrun and N. J. A. Sloane, Aug 24 2010

STATUS

approved

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Last modified October 14 02:19 EDT 2019. Contains 327994 sequences. (Running on oeis4.)