10 lines
479 B
Markdown
10 lines
479 B
Markdown
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The arithmetic sequence, `1487, 4817, 8147`, in which each of the terms increases by `3330`, is unusual in two ways:
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- (i) each of the three terms are prime, and,
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- (ii) each of the 4-digit numbers are permutations of one another.
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There are no arithmetic sequences made up of three 1-, 2-, or 3-digit primes, exhibiting this property, but there is one other 4-digit increasing sequence.
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What 12-digit number do you form by concatenating the three terms in this sequence?
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