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207 (another Prime Pages' Curiosity) |
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will be down at times on those day (and possibly the next). (caldwell@utm.edu) The smallest possible sum of primes which are formed using each of the digits 1 through 9 (i.e., 89 + 61 + 43 + 7 + 5 + 2 = 207). [Gupta] 3^207 + 3^207 + 23^207 is prime. Note that 3*3*23 = 207. [Zucker] 207 = (2+0+7) * prime(2+0+7). Note that 207 is the second number with this property. [Firoozbakht]
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