This number is a composite.
Single Curio View: (Seek other curios for this number)A composite string S formed from the digits 1, 3, 7 and 9. There are 74 primes embedded in S, read left-to-right only. This is the maximal quantity known for 20 digits. Found by Dmitry Kamenetsky. [Rivera]
Submitted: 2019-01-12 12:56:56; Last Modified: 2019-01-12 14:06:19.
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