Fun with Prime Numbers

33 replies · 8493 views

Dark Lord's avatar
Dark Lord
Posts: 4628
#1

Some dude a very long time ago told me that every even number can be expressed as the sum of two different prime numbers...

Let's test that!

Starting with 10 and moving on...

10 = 7 + 3

12 = 7 + 5

14 = 11 + 3

16 = 11 + 5

18 = 11 + 7

20 = 13 + 7

22 = 17 + 5

You get the idea?

Let's go!

O
Over rays
Posts: 633
#2

This category belongs to computer related help But you start a fun chichat or its also some kind of computer related thingy ? Anyway About your game I cannot understand. Would you please tell me more about it ? I mean what that dude tell you about numbers ?

Posts: 7079
#3

24=13+11

26=13+13

28=17+11

30=17+13

Like this?

Dark Lord's avatar
Dark Lord
Posts: 4628
#4

YES! Like that. This is my bad because I didn't indicate that the two prime numbers had to be different but 26 should be 23 + 3.

Isn't this fun?

32 = 27 + 5

34 = 27 + 7

36 = 19 + 17

38 = 31 + 7

encantador's avatar
encantador
Posts: 4868
#5

40 = 29 + 11

42 = 31 + 11

44 = 37 + 7

46 = 41 + 5

Dark Lord's avatar
Dark Lord
Posts: 4628
#6

48 = 41 + 7

50 = 37 + 13

52 = 41 + 11

54 = 41 + 13

Posts: 7079
#7

56=43+13

58=41+17

60=29+31

62=43+19

Dark Lord's avatar
Dark Lord
Posts: 4628
#8

^_^ More math nerds!

64 = 41 + 23

66 = 37 + 29

68 = 37 + 31

70 = 41 + 29

Posts: 7079
#9

72=41+31

74=43+31

76=53+23

78=61+17

80=61+19

82=53+29

84=53+31

86=67+19

88=71+17

90=71+19

92=89+3

94=23+71

Posts: 7079
#10

96=73+23

98=79+19

100=83+17

102=83+19

104=97+7

Dark Lord's avatar
Dark Lord
Posts: 4628
#11

I see someone is enjoying this.

106 = 103 + 3

108 = 97 + 11

110 = 79 + 31

112 = 83 + 29

114 = 97 + 17

116 = 73 + 43

118 = 113 + 5

120 = 61 + 59

encantador's avatar
encantador
Posts: 4868
#12

122 = 63 + 59

124 = 103 + 21

126 = 103 + 23

128 = 107 + 21

130 = 73 + 57

132 = 129 + 3

134 = 35 + 99

136 = 83 + 53

ve.ro.nika's avatar
ve.ro.nika
Posts: 6880
#13

2 = 1+1

encantador's avatar
encantador
Posts: 4868
#14
2 = 1+1

You probably feel we should've started with 2, don't you Stop ruinig the sequence! :persuazn:

138 = 131 + 7

140 = 79 + 61

ve.ro.nika's avatar
ve.ro.nika
Posts: 6880
#15

oh Im sorry! I didnt see the sequence

Dark Lord's avatar
Dark Lord
Posts: 4628
#16

lol.. a non-nerd!

142 = 101 + 41

144 = 97 + 47

146 = 109 + 37

148 = 101 + 47

150 = 89 + 61

Posts: 7079
#17

152=151+1

154=151+3

156=151+5

158=151+7

160=157+3

162=157+5

164=163+1

166=163+3

168=163+5

170=163+7

172=167+5

174=167+7

176=173+3

178=173+5

180=173+7

182=181+1

184=181+3

186=181+5

188=181+7

190=179+11

192=191+1

194=191+3

196=191+5

198=191+7

200=199+1

202=199+3

204=199+5

206=199+7

208=197+11

210=197+13

212=211+1

214=211+3

216=211+5

218=211+7

220=197+23

222=193+29

Edit: Sorry, it should be 193 instead of 293.

encantador's avatar
encantador
Posts: 4868
#18

^^You made a mistake in the last calculation

224 = 211 + 13

226 = 173 + 53

228 = 223 + 5

230 = 127 + 103

232 = 59 + 173

234 = 83 + 151

236 = 223 + 13

238 = 197 + 41

240 = 229 + 11

242 = 199 + 43

246 = 233 + 13

248 = 151 + 97

250 = 239 + 11

252 = 113 + 139

OMG i see I corrected it

Posts: 7079
#19

Some of numbers you used are not primes.

You have list that can help you here

Dark Lord's avatar
Dark Lord
Posts: 4628
#20

I love this thread! ^_^

254 = 251 + 3

256 = 151 + 97

258 = 157 + 101

260 = 163 + 97

262 = 257 + 5

264 = 211 + 53

266 = 263 + 3

268 = 131 + 137

270 = 263 + 7

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