Prime p₀= 491242284941786363 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 6 12 6 42 50 10 14 16 8 136 8 16 14 10 50 42 6 12 6 (?)
a_n: 0 6 18 24 66 116 126 140 156 164 300 308 324 338 348 398 440 446 458 464
All 20 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 464
derived by truncating larger tuple
Found by: Steve Dodd
db: batch=70, k=20, 6 12 6 42 50 10 14 16 8 136

SPT(14)	491242242793290007	0 54 66 70 106 144 154 162 172 210 246 250 262 316	-42148496356
SPT(14)	491242254389212351	0 18 28 42 48 60 72 76 88 100 106 120 130 148	-30552574012
TPT(12)	491242261345644707	0 2 42 44 84 86 150 152 222 224 252 254	-23596141656
SPT(14)	491242275389820379	0 18 22 34 42 54 84 88 118 130 138 150 154 172	-9551965984
SPT(14)	491242281297274669	0 30 42 100 130 172 178 204 210 252 282 340 352 382	-3644511694
SPT(22)	491242284941786293	0 70 76 88 94 136 186 196 210 226 234 370 378 394 408 418 468 510 516 528 534 604	-70
STPT(10)	491242290714055289	0 2 12 14 90 92 168 170 180 182	5772268926
SPT(14)	491242295950640957	0 24 30 50 62 66 92 114 140 144 156 176 182 206	11008854594
SPT(14)	491242302411387587	0 36 56 86 114 126 132 134 140 152 180 210 230 266	17469601224
SPT(16)	491242316523445259	0 2 42 84 104 132 174 210 224 260 302 330 350 392 432 434	31581658896
SPT(14)	491242320805263151	0 36 40 76 82 108 138 160 190 216 222 258 262 298	35863476788
TPT(12)	491242326028051667	0 2 42 44 54 56 60 62 114 116 144 146	41086265304