List of recent champions for factoring Cunningham numbers:

Special number field sieve by size of number factored:
6297	C355	2,1193-	J.Bos+T.Kleinjung+A.K.Lenstra
6315	C342	2,1171-	J.Bos+T.Kleinjung+A.K.Lenstra

Special number field sieve by SNFS difficulty:
6297	C355	2,1193-	J.Bos+T.Kleinjung+A.K.Lenstra
6315	C342	2,1171-	J.Bos+T.Kleinjung+A.K.Lenstra

General number field sieve by size of number factored:
6319	C221	3,697+	NFS@Home
6269	C216	3,766+	NFS@Home

Elliptic curve method:
6208	P83	7,337+	R. Propper
6135	P79	11,306+	S. Wagstaff

Largest penultimate prime factor (ultimate factor shown also):
6302	p146.p156 2,1109-   J.Bos+T.Kleinjung+A.K.Lenstra
6409	p144*p146 10,302+   NFS@Home
6132	p143*p177 2,1061-   NFS@Home

	First five holes in each table on January 10, 2019

2,1207-	c337	2,1213-	c297	2,1217-	c248	2,1229-	c284	2,1231-	c329
2,1033+	c255	2,1037+	c209	2,1063+	c281	2,1087+	c276	2,1091+	c307
2,2062L	c306	2,2062M	c259	2,2066L	c266	2,2066M	c252	2,2078M	c313
2,1052+	c300	2,1072+	c271	2,1076+	c238	2,1084+	c318	2,1108+	c271

3,661-	c316	3,667-	c275	3,677-	c259	3,691-	c265	3,703-	c269
3,653+	c270	3,659+	c306	3,662+	c242	3,668+	c277	3,674+	c247

5,449-	c271	5,493-	c277	5,503-	c260	5,509-	c271	5,519-	c364
5,446+	c274	5,449+	c273	5,452+	c246	5,454+	c285	5,457+	c302

6,401-	c274	6,421-	c281	6,431-	c321	6,437-	c273	6,439-	c293
6,404+	c266	6,409+	c311	6,419+	c261	6,421+	c246	6,431+	c331

7,367-	c252	7,379-	c320	7,383-	c274	7,389-	c299	7,395-	c220
7,367+	c301	7,373+	c303	7,376+	c311	7,379+	c320	7,386+	c245

10,323-	c271	10,337-	c268	10,353-	c328	10,365-	c288	10,371-	c255
10,311+	c223	10,313+	c230	10,323+	c242	10,332+	c295	10,338+	c308

11,307-	c289	11,311-	c251	11,313-	c273	11,317-	c319	11,323-	c241
11,302+	c225	11,307+	c276	11,311+	c247	11,326+	c334	11,328+	c242

12,289-	c248	12,293-	c238	12,311-	c335	12,313-	c283	12,319-	c260
12,289+	c265	12,293+	c303	12,298+	c305	12,305+	c212	12,307+	c304