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A066738
Primes that are concatenations of nonprime numbers.
1
11, 19, 41, 61, 89, 101, 109, 127, 139, 149, 151, 157, 163, 181, 191, 193, 199, 211, 229, 241, 251, 269, 271, 281, 331, 349, 359, 389, 401, 409, 419, 421, 433, 439, 449, 457, 461, 463, 487, 491, 499, 509, 521, 541, 569, 571, 601, 619, 631, 641, 659, 661
OFFSET
1,1
EXAMPLE
The prime 163 is the concatenation of nonprime numbers 1 and 63. 419 is the concatenation of 4, 1 and 9.
CROSSREFS
Sequence in context: A136026 A033201 A154386 * A278799 A337508 A081027
KEYWORD
base,easy,nonn
AUTHOR
Joseph L. Pe, Jan 16 2002
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org), Apr 03 2002
STATUS
approved