A066738 Primes that are concatenations of nonprime numbers.

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

Author

Joseph L. Pe, Jan 16 2002

Keywords

• base
• easy
• nonn

Examples

			The prime 163 is the concatenation of nonprime numbers 1 and 63. 419 is the concatenation of 4, 1 and 9.
		

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Apr 03 2002