Prime p₀= 1271127021589512931 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 18 12 40 6 24 20 6 16 18 38 18 16 6 20 24 6 40 12 18 (?)
a_n: 0 18 30 70 76 100 120 126 142 160 198 216 232 238 258 282 288 328 340 358
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: 358
derived by truncating larger tuple
Found by: modesti
db: batch=77, k=20, 18 12 40 6 24 20 6 16 18 38

STPT(10)	1271126538737735591	0 2 6 8 18 20 30 32 36 38	-482851777340
TPT(14)	1271126565525036587	0 2 54 56 90 92 204 206 210 212 222 224 252 254	-456064476344
STPT(12)	1271126613420197711	0 2 6 8 36 38 210 212 240 242 246 248	-408169315220
SPT(16)	1271126847079107373	0 4 54 66 106 144 148 166 258 276 280 318 358 370 420 424	-174510405558
SPT(16)	1271126980633362757	0 36 66 100 114 150 154 160 186 192 196 232 246 280 310 346	-40956150174
SPT(22)	1271127021589512907	0 24 42 54 94 100 124 144 150 166 184 222 240 256 262 282 306 312 352 364 382 406	-24
SPT(16)	1271127151667189623	0 46 58 76 160 226 234 244 270 280 288 354 438 456 468 514	130077676692
STPT(10)	1271127273094964447	0 2 30 32 42 44 54 56 84 86	251505451516
SPT(16)	1271127693682945243	0 34 40 70 94 120 126 144 280 298 304 330 354 384 390 424	672093432312
TPT(14)	1271127860920660331	0 2 66 68 138 140 276 278 378 380 420 422 450 452	839331147400
STPT(10)	1271127962536639187	0 2 120 122 222 224 324 326 444 446	940947126256
STPT(10)	1271128012887989699	0 2 42 44 60 62 78 80 120 122	991298476768