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Participate: 
1136972771 = 11 * 31 * 71 * 151 * 311 is a Zeisel Number
because its five prime factors are consecutive elements of
the linear recurrence prime(i+1) = 2*prime(i) + 9.
Curiously, all of those prime factors are either
palindromes or emirps, since 11, 13, 17, 151, and 113 are
primes. Note that 1136972771 righttruncates to the prime
11369 and then 113 (the digit reversal of one of its
factors), and lefttruncates to the prime 71 (one of its
factors). [Post]
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