The book is now available! 11011...11011 (25-digits)
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                                                 11011 1101100900 1101111011
+ The smallest "almost plus sign prime" of order 5. Note that its sum of digits is equal to its length. (An almost plus sign prime is a plus sign prime having a distinct central digit.
1 1 0 1 1
1 1 0 1 1
0 0 9 0 0
1 1 0 1 1
1 1 0 1 1 
[Loungrides]




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