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There are 2339 ways to arrange the set of twelve pentominoes into a 6-by-10 rectangle. The smallest prime whose fourth power is pandigital (i.e., containing all digits from 0 to 9). [Gupta] The sum of the first 2339 (a prime total) odd composites (9 + 15 + 21 + ... + 6321) is a palindromic prime (7576757). [De Geest]
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