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Old 2010-12-04, 01:53   #1
3.14159
 
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Default Types of primes searched for.

If I try remembering every type of prime I've searched for, I think I may have searched about.. less than 10 types of primes, the majority being k * n + 1. However, if I were to count every type of (k * n + 1) prime I've thought up of or encountered, I think that would be 40-70 types of primes in total. (That is, where n has a special property, for example, n is a factorial number, or a primorial number, or prime power, etc.).

I think about 90-95% of my prime searching is k * n + 1.

I think I can generalize into two types;

1. k * n + 1
2. General (nonspecial) primes.

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Old 2010-12-04, 02:04   #2
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An example of each;

1. 1350 * (1547! * p(1547)#) + 1
2.
Code:
78455985083888466751240801476493279140887765454003961603150719846455309349750538970099946114841949767332590520242553319719654839118237211932148372582044736790537396647365913141623996942979615333547084787754042519896536771005904609645654572872136457513664944217006417345286215095563625376013627652385577651711138659815035314334055836722716636283365596955064923223210664275059318234565394224218770554367684375733401167529376992849209468991878375179430383286989649795009300693062716130277375872218483418644190073746103631330194835080004641543889233974153684286149049404174767223990141600110408391265821014233049023212633573750249226481164803388092709339896223535601954465563949074477484165197924472514148947419008233390078949462783322778732935228582299532423268519339321008130908469261075508921144445075468662897997471322653562719467187972550597243841664884454314667406177129888022822105329512335470169586164035618585635081064677916916498607699198283087882332685283386712528003049807024290239107383625076313432280106034426723402532502293461231664573019135743225120946038879304100384547185262466947086821459054112916899919258660729925038344488846504418331631585489962096795144215911782206378136417890115188931062761984689946910332633469826409909684264698003153639505356682034408252001
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Old 2010-12-04, 13:09   #3
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Quote:
Originally Posted by 3.14159 View Post
If I try remembering every type of prime I've searched for, I think I may have searched about.. less than 10 types of primes, the majority being k * n + 1. However, if I were to count every type of (k * n + 1) prime I've thought up of or encountered, I think that would be 40-70 types of primes in total. (That is, where n has a special property, for example, n is a factorial number, or a primorial number, or prime power, etc.).

I think about 90-95% of my prime searching is k * n + 1.

I think I can generalize into two types;

1. k * n + 1
2. General (nonspecial) primes.
the forum last I checked searched for Mersenne,Sierpinski,Riesel,and Twin primes there that answers primes searched for.
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