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According to the 16th century prophet Nostradamus, the Earth will survive until A.D. 3797. [Skinner] 3797 is the only fourdigit prime, in which: i.The first digit and the last digit are primes. (3,7) ii.The first twodigit number, the second twodigit number and the third twodigit number are primes. (37,79,97) iii.The first and the last threedigit numbers are primes. (379,797) [Sreechakra] The center of a 7by7 magic square of primes which stays a magic square (but with 7 primes) if the units digits of all entries are removed (i.e., 9341 becomes 934, ...). [Madachy]
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