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Post Closed as "Not suitable for this site" by Wolfgang, Seva, Joonas Ilmavirta, Chris Wuthrich, Gerry Myerson
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Carlo Beenakker
Carlo Beenakker
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ppintersectionenter image description here.................................................. ..................................................... .......................................................

For example look at the number 9. It has prime-prime matching at 3,5, and 7.

For example the sequence of 13 has matchings at 1,3,7,11,13.

For example 15 has the matchings(crossings) at 3,5,11,13.

Is there an odd number for which the prime prime matchings do not occur?

ppintersection.................................................. ..................................................... .......................................................

For example look at the number 9. It has prime-prime matching at 3,5, and 7.

For example the sequence of 13 has matchings at 1,3,7,11,13.

For example 15 has the matchings(crossings) at 3,5,11,13.

Is there an odd number for which the prime prime matchings do not occur?

enter image description here

For example look at the number 9. It has prime-prime matching at 3,5, and 7.

For example the sequence of 13 has matchings at 1,3,7,11,13.

For example 15 has the matchings(crossings) at 3,5,11,13.

Is there an odd number for which the prime prime matchings do not occur?

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user42094
user42094

Is there an odd number which has no prime to prime matchings when compared with its reverse order?

ppintersection.................................................. ..................................................... .......................................................

For example look at the number 9. It has prime-prime matching at 3,5, and 7.

For example the sequence of 13 has matchings at 1,3,7,11,13.

For example 15 has the matchings(crossings) at 3,5,11,13.

Is there an odd number for which the prime prime matchings do not occur?