1. Prime Numbers
1
Prime numbers
m%:ul ixLHd

2. Prime Numbers
2
Prime numbers ^m%:ul ixLHd&
Prime numbers hkq@
Prime numbers lsh,d lshkafka ;ukaf.ka yd 1 ka yer fjk;a lsisu ixLHdjlska b;sß
ke;sj fnokak neß ixLHd j,g'
ta lshkafka fudllao@
´ku ixLHdjla .;a;u tal ;ukaf.ka fnokak mq`:jkafka' t;fldg W;a;f¾g ,efnkafka 1
lshk ixLHdj' 1 tflka fnÿju 1 hs' 2 foflka fnÿju ta;a 1 hs' 3 ;=fkka fnÿj;a W;a;f¾
fjkafka 1 hs' fï úosyg ´ku ixLHdjla ;ukaf.kau fnÿju ,efnk W;a;f¾ 1hs'
wfkla w;g ´ku ixLHdjla 1 ka fnokak mq`:jka' t;fldg ,efnk W;a;f¾ fjkafka ta
ixLHdjuhs'
f.dvla ixLHd Th lshk 1 lshk ixLHdfjkqhs ;ukaf.kqhs yefrkak ;j;a tl ixLHdjlska
yß fnokak mq`:jka' 4 lshk ixLHdj .;af;d;a 1 ka 4 ka jf.au 2 kq;a fnokak mq`:jkafka'
wkak ta jf.a'
fï ;sfhkafka Prime numbers j,g WodyrK
2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 ….
fï ixLHd tllaj;a 1 kqhs ;ukaf.kqhs yefrkak fjk;a lsisu ixLHdjlska b;sß ke;sj
fnokak nE'
t;fldg 1 @
oeka wmsg .eg`:jla tkjd' ta ;ud 1 lshkafka Prime number tllao keoao lshk tl' 1 ;a
fnfokafka 1 kqhs ;ukaf.kqhs ú;rhsfkaa'
ta;a iïu;hla úosyg 1 Prime number tlla lsh,d i,lkafka kE' tal u;l ;shd.kak
´k'
1 Prime number tlla fkdfõ

3. Prime Numbers
3
brÜfÜ Prime numbers
fï lshkak hkafka u;l ;shd.kak ´k jeo.;a fohla' iïmQ¾K Prime numbers
l=,lhgu ;sfhk tlu brÜfÜ ixLHdj fjkafka 2 lshk ixLHdj ú;rhs' ta wehs lsh,d kï
wuq;=fjka lshkak ´k kE fka' brÜfÜ ixLHd lshkafka 2 ka fnfok ixLHd lshk tlgfka' ta
lshkafka 2 g jeä brÜfÜ ixLHd Tlafldu 1 kqhs ;ukaf.kqhs Bg wu;rj wvqu ;rfï 2 kq;a
fnfokjd' b;ska fldfyduo tajd Prime numbers fjkafka@
tlu brÜfÜ Prime number tl jkafka 2 muKs
Prime factors
Prime number tlla fudlla yß ixLHdjl idOlhla fjkjkï wms ta idOlh
y÷kajkjd Prime factor tlla lsh,d'
WodyrKhla úosyg .;af;d;a 2 lshk ixLHdj 6 lshk ixLHdfõ idOlhla
fjkjd jf.au Prime number tll=;a fjkjfka' b;ska ta ksid wmsg 2 lshk
ixLHdj 6 fha Prime factor tlla lsh,d lshkak mq`:jka'
Composite numbers
Prime fkdjk ixLHd ;uhs wms fï kñka y÷kajkafka' tfyukï fï .Khg
whs;s fjkafka 1 kqhs ;ukaf.kqhs yefrkak wvqu ;rñka ;j;a tla ixLH djlska
j;a b;sß ke;sj fnokak yelshdj ;sfhk ixLHd'
Wod # 6
𝟔
𝟏
= 𝟔
𝟔
𝟔
= 𝟏
𝟔
𝟐
= 𝟑
𝟔
𝟑
= 𝟐

4. Prime Numbers
4
u;lo n,kak
1' Prime number tlla hkqfjka y÷kajkafka l=ulao@
2' Prime numbers lsysmhlg WodyrK fokak'
3' my; ixLHd w;=rska Prime number tlla fkdjk ixLHdj f;darkak'
i' 3 ii' 1 iii' 13
iv' 7 v' 19
4' brÜfÜ ixLHdjla jk tlu Prime number tl l=ulao@
5' Prime factor tlla hkq l=ulao@
6' Composite number tlla hkq l=ulao@

5. Prime Numbers
5
Sameera Rukshan